Qmee randomly sent me $5

I have been on Qmee for well over a year or so now. I've cashed out many times, so I'm aware of how the process works and it usually shows up in my PayPal within a few minutes in most cases, besides a couple times where it took ten to fifteen minutes. Last night, I cashed out $8.79 from some surveys I did throughout the day. Within a few minutes, it showed up in my PayPal as expected. Today I did a few surveys worth about $1.40 but haven't tried to cash it out. However, I got an alert that Qmee sent $5. I checked my PayPal and sure enough there was a $5 transaction from Qmee. Has anyone else have this happen or know what it could be from?