Usually, MCAT and AMCAS just coordinate together, but I would doublecheck anyway. I had a nightmare getting my MCAT scores on to my application just to complete my AMCAS app.
When I submitted my AMCAS application last July, for some reason, even though I took the MCAT in April and had released my scores during test day, my test scores didn't appear on my AMCAS application. I thought it was just a weird glitch at the time and didn't think about it again until UPitt sent me a letter at the end of August informing me that I had never took the MCAT before and could not apply to medschool.
AMCAS didn't fix the mistake until almost the end of October.
If you suspect anything wrong, hunt AMCAS down.
