If you give AACOMAS a call, can you let me know what they tell you? I emailed them with the same question and got this as an answer:
Hello,
Thank you for contacting AACOMAS. If you retook the series at another school
and CHEM A and B is equivalent to the 3 part series, then that should be
acceptable. As each school are operating on a different system.
Please don't hesitate to contact us if you should have any more questions.
Thank you,
AACOMAS Support Team
I'd love to get verification from a confirmed human though. Thanks!