Just started to use SG again, so i got a question about these levels.

Since i haven't used SG for a long time, i saw i was level 4, and i've given away games for 400$+, so to get to level 5, i thought i had to give away 500$+. Today i reached 500$, but i'm still level 4.

So id like to ask you guys, how do i reach level 5? If you know how the level system works, it would be nice if you could tell me :)