Stanford High School Summer College Classes

I’ve been admitted into Stanford High School Summer College. I know that some people are against this, but I feel that the opportunity to be productive during the summer, develop relations with professors, and gain college credit is worth it. Obviously, I know that I will not be given any special consideration in admissions. But my main concern is one thing: taking classes to prepare me for next year. If at Stanford I take Intro to Chem and then the next year I take AP Chem in school, would colleges not like that? Would they that it is redundant? Thank you.