Name Problem With My Collegeboard Account

I have an awfully long legal name (its 4 names long) . When I first started taking my AP Exams, my college counselor told me to go either with the full name I go by (which is middle name+last name) or write the entire name out (but this was getting too difficult on AP test days) . I don’t plan on sending any of my AP scores through Collegeboard to colleges, but rather through my high school transcript (and my school’s authorities use and know both of the names) so should I not worry about contacting Collegeboard about the name change. Finally, for the SAT,ACT,and PSAT , I plan on using my full legal name. Do you think that this will cause confusion when I apply to colleges.