US map not displaying completely

[aptean-zz]

I am using the standard US svg map; have 'element Border' checked; my states data matches the regions. Shading is reflecting data properly.But the map is very inconsistent in drawing/displaying all states. If I uncheck and recheck 'Element Borders' it will sometimes display all states and other times will display a different partial set of states.
What should I do for the extension to consistently properly display the states/regions?
Thanks very much!