this is happening to me as well, i had 99 subs i think yesterday or day before , and i was happy since it's close to 100 (my current goal) but now i have 98. i also had short period of time when my subs would go between 2 numbers (i forgot but it was like 76 and 78, or something else with 6 and 8), it can be from glitches , and sub4sub people unsubscribing.....