dss-0215 check off DSS0215 and DSS020 for subscriptions

monitoring/uss_qualifier/scenarios/astm/utm/dss/fragments/subscription_sync.md

@@ -7,37 +7,71 @@ This test step fragment validates that subscriptions are properly synchronized a
 If the previously created or mutated subscription cannot be found at a DSS, either one of the instances at which the subscription was created or the one that was queried,
 may be failing to implement **[astm.f3548.v21.DSS0210,1a](../../../../../requirements/astm/f3548/v21.md)**.
 
+Alternatively, the DSS through which the subscription was created or mutated may may be returning API calls to the client before having updated its underlying distributed storage.
+If so, it would be in violation of **[astm.f3548.v21.DSS0215](../../../../../requirements/astm/f3548/v21.md)**.
+
+As a result, the DSS pool under test is failing to meet **[astm.f3548.v21.DSS0020](../../../../../requirements/astm/f3548/v21.md)**.
+
 ## 🛑 Propagated subscription contains the correct USS base URL check
 
 If the subscription returned by a DSS to which the subscription was synchronized to does not contain the correct USS base URL,
 either one of the instances at which the subscription was created or the one that was queried, may be failing to implement **[astm.f3548.v21.DSS0210,1c](../../../../../requirements/astm/f3548/v21.md)**.
 
+Alternatively, the DSS through which the subscription was created or mutated may may be returning API calls to the client before having updated its underlying distributed storage.
+If so, it would be in violation of **[astm.f3548.v21.DSS0215](../../../../../requirements/astm/f3548/v21.md)**.
+
+As a result, the DSS pool under test is failing to meet **[astm.f3548.v21.DSS0020](../../../../../requirements/astm/f3548/v21.md)**.
+
 ## 🛑 Propagated subscription contains the correct start time check
 
 If the subscription returned by a DSS to which the subscription was synchronized to does not contain the correct start time,
 either one of the instances at which the subscription was created or the one that was queried, may be failing to implement **[astm.f3548.v21.DSS0210,1e](../../../../../requirements/astm/f3548/v21.md)**.
 
+Alternatively, the DSS through which the subscription was created or mutated may may be returning API calls to the client before having updated its underlying distributed storage.
+If so, it would be in violation of **[astm.f3548.v21.DSS0215](../../../../../requirements/astm/f3548/v21.md)**.
+
+As a result, the DSS pool under test is failing to meet **[astm.f3548.v21.DSS0020](../../../../../requirements/astm/f3548/v21.md)**.
+
 ## 🛑 Propagated subscription contains the correct end time check
 
 If the subscription returned by a DSS to which the subscription was synchronized to does not contain the correct end time,
 either one of the instances at which the subscription was created or the one that was queried, may be failing to implement **[astm.f3548.v21.DSS0210,1e](../../../../../requirements/astm/f3548/v21.md)**.
 
+Alternatively, the DSS through which the subscription was created or mutated may may be returning API calls to the client before having updated its underlying distributed storage.
+If so, it would be in violation of **[astm.f3548.v21.DSS0215](../../../../../requirements/astm/f3548/v21.md)**.
+
+As a result, the DSS pool under test is failing to meet **[astm.f3548.v21.DSS0020](../../../../../requirements/astm/f3548/v21.md)**.
+
 ## 🛑 Propagated subscription contains the correct version check
 
 If the subscription returned by a DSS to which the subscription was synchronized to does not contain the correct version,
 either one of the instances at which the subscription was created or the one that was queried, may be failing to implement **[astm.f3548.v21.DSS0210,1f](../../../../../requirements/astm/f3548/v21.md)**.
 
+Alternatively, the DSS through which the subscription was created or mutated may may be returning API calls to the client before having updated its underlying distributed storage.
+If so, it would be in violation of **[astm.f3548.v21.DSS0215](../../../../../requirements/astm/f3548/v21.md)**.
+
+As a result, the DSS pool under test is failing to meet **[astm.f3548.v21.DSS0020](../../../../../requirements/astm/f3548/v21.md)**.
+
 ## 🛑 Propagated subscription contains the correct notification flags check
 
 If the subscription returned by a DSS to which the subscription was synchronized to does not contain the correct notification flags,
 either one of the instances at which the subscription was created or the one that was queried, may be failing to implement **[astm.f3548.v21.DSS0210,1g](../../../../../requirements/astm/f3548/v21.md)**.
 
+As a result, the DSS pool under test is failing to meet **[astm.f3548.v21.DSS0020](../../../../../requirements/astm/f3548/v21.md)**.
+
 ## 🛑 Propagated subscription contains the correct implicit flag check
 
 If the subscription returned by a DSS to which the subscription was synchronized to does not contain the correct implicit flag,
 either one of the instances at which the subscription was created or the one that was queried, may be failing to implement **[astm.f3548.v21.DSS0210,1h](../../../../../requirements/astm/f3548/v21.md)**.
 
+As a result, the DSS pool under test is failing to meet **[astm.f3548.v21.DSS0020](../../../../../requirements/astm/f3548/v21.md)**.
+
 ## 🛑 Propagated subscription contains expected notification count check
 
 If the subscription returned by a DSS to which the subscription was synchronized to does not contain the expected notification count,
 either one of the instances at which the subscription was created or the one that was queried, may be failing to implement **[astm.f3548.v21.DSS0210,1i](../../../../../requirements/astm/f3548/v21.md)**.
+
+Alternatively, the DSS through which the subscription was created or mutated may may be returning API calls to the client before having updated its underlying distributed storage.
+If so, it would be in violation of **[astm.f3548.v21.DSS0215](../../../../../requirements/astm/f3548/v21.md)**.
+
+As a result, the DSS pool under test is failing to meet **[astm.f3548.v21.DSS0020](../../../../../requirements/astm/f3548/v21.md)**.