Big discrepancy between dollars in Usage: Total spend vs April budget vs Credit Grants

Hi,

I imagine others had the same issue, but I can figure out the right answer. I started to use the Open API Platform yesterday. I charged 20$ into my account. I did some calls to mini and some to Pro. Of which various broke. In my billing history I see only these 20$ charges, in credit grants they say that they are all available. But when I enter into usage I find on the left Total Spend 0$ and on the right April Budget 90$/50$.

In my bank account indeed they charged just the 20$, but how to know what is happening ? I mean how do I check what I paid or have to pay? (which of the two is the reality?)

thanks,

Leonardo.