Common App Recommenders as a transfer student?

Currently trying to submit my application to Boston University. However, one of my assigned recommenders (old high school teacher) is having trouble submitting his recommendation. He said this is because I have him listed as an “academic evaluator” rather than “teacher.” When I got into the common app, I see no teacher option, just academic evaluator. Is this possibly because I am applying as a transfer student? Has anyone else had this issue/know a way around it? Thanks!