300 donor prize box question

I went from 50 to 300 donor level and received 3 prize boxes I think I was due more?

Level 4
Prizeboxes - Every time you donate $50 or more, you'll get a Sythe Prizebox!
Maybe I’m wrong?

 

Please read: Prizeboxes error

 

Please read: Prizeboxes error

Sorry i didn’t see that thread. If I’d of known that I woulda donated in increments. Thanks