Deposit from TREAS 310 for 7 dollars 3 months after I filed, and received full payment from my tax return just a week or so later.

Just today 8/17/20 I received a deposit for $7.19 from TREAS 310 TAX REF, the only thing is that by 7/6/2020, my tax refund was paid fully. I have NOT received my stimulus check yet, and I still get a Payment Status Not Available from the get my payment portal. I just want to know where this mishap is coming from.