I wrote ACCOMAS about this same thing and I also wrote my schools. I am not joking when half said to send them a copy (Like TUCOM) and the other half said to report it in a letter to AACOMAS and send in another transcript that way they can update their files. (Like DMU)
I did both.
I just had a standard form letters saying that I have had additional grades that were not on the original application and could you please consider these for my admittance. I can't remember if I sent them a real transcript or a copy though.
I did send a real transcript and a more formal letter about it to AACOMAS. They still got all my info before the big interview season cause I did this last August and interviews were not until late september early october.