The background info: I am a postbac in Speech and Hearing Science, currently attending at what is my top choice for graduate school. I am also applying to several other schools. I talked to the graduate advisor in the department at my top choice, who recommended that two of my letters come from professors, and one from someone who can give the admissions committee a fuller picture of me (volunteer supervisor, boss, etc). So that's what I am doing for that school.
However, three of the schools I am applying to strongly recommend three professorial letters. I am planning on asking a prof. at my current school; I've taken two classes with her, and although they were both enormous lectures, I did very well in them and often met with her during her office hours. She has basically agreed to write them, but we are meeting next week to discuss it in more detail.
However, is it weird to ask her NOT to write the letter for my top choice school, which is also the school she teaches at?