Probly the same glitch that's been in the system for years
There has been no such "glitch in the system" for years. Barring the one time when they actually did have people deactivated for nonpayment unintentionally, causing them to incur more fees to get back online, this has never happened with any regularity. 99% of all "double charges" under the old system were not double charges at all- it simply charged users for the month of reactivation and the next month at the same time. It looks like a double charge but it's not, because you never actually paid for the reactivated month.