code level support case status

>I am wondering if I missed an email or something.

Could be - make sure emails from Apple aren't being spam filtered. But if the credit is the latest status, I'd assume it was closed the next day and you can stop waiting.

'Use' means consumed - deducted from any valid tickets in your account. Pretend it says 'used up'.

'Credit' means backed out...reversed, refunded. If you had two, then one, now you have two again.

An example would be a support request that turns out to not qualify - they give it back to you so you can use it again, versus being deducted. Devs get two per year with an account purchase/renewal. More can be purchased if needed.

>Is there some documentation some where explaining this?

I only know because I've burned a few tickets in the past and an Engr. graciously explained it to me one time. You might need to sit thru a video to find out if it's otherwise spelled out now.

From the Support info page:

For more tips on requesting help from Developer Technical Support, submitting bug reports, and more, watch Maximizing Apple Development Resources.