What is the expiration of my GoPhone Balance if I buy 10 months of $10 auto refill?

called in an found out that the expiration is only 365 days if I get an inital $100 refill card.

The expiration date defaults to the last refilled amount's expiration

$10 - Expires after 30 days
$15 - Expires after 30 days
$25 - Expires after 90 days
$50 - Expires after 90 days
$65 - Expires after 90 days

$100 - Expires after 365 days

So if you bought a $10 refill, then 29 days later bought a $25 refill card your new expiration date would be 90 days of the total prepaid balance of the account.

Buying two $50 cards would give you a $100 balance but only a 90 day expiration

No so!

I just refilled with a  "90 day" refill card and it still only

advanced the next refill date for 30 days.

What seems to be the problem here?

Thanks, Jim...