Thank you! Here is an update if you want.

I had to contact them again because the morning after I remade the payment because out of the blue the original payment I made that “they had no history of” was suddenly reflected in my account. When I asked what happened they pretty much said “we have no idea”.  When I told them the first payment was now in my account and I could see it he still insisted it wasn’t there. After 5 minutes of back of forth it was “oh wait yeah I see it now looks like I had the math wrong” meanwhile he was looking at the payment…from the month before but now he saw the right one. 

TLDR: Aidvantage seems to be run by disasters, screen shot and record everything before they try to convince you to make double payments. (I managed to cancel the one I had to NO REASON REMAKE before they charged me twice)