new zealand timezone +13,0

[aum7]

using: maitreya 8.1 (latest greatest)
os: linux mint 21.3
asus a15 laptop

when i add any city from atlas database
in new zealand
i get timezone +13,0 (hours)
to my knowledge, this is not possible,
max is either (plus) +12 (ie new zealand) or (minus) -12 hours
we are NOT talking dls (daylight saving) here

example:
maitreya - new chart [ctrl-n]
edit data [b]
...
birth data popup -> location -> name -> ie amberley -> search location
atlas popup - when amberley new zealand is selected, tz hours is +13,0

if i save the chart, then close maitreya, and re-open maitreya,
and open this new chart (with wrong timezone offset), i get an error popup:

can reproduce with other new zealand places / cities from atlas db

also, if i 'mess' with (i must, otherwise i can not open the saved .mtx chart)
birth data popup [b] -> time zone -> time zone field,
i can not set 12:00 (tz offset) with mouse scroll, it only goes to
11:00 for hours, or 11:59 for hours & minutes, then it jumps to 00:00
i can, however, set 12:00 (tz offset) with keyboard

thx for sharing,

have fun

aum