Whenever i save my game in Sims 4 it saves as an insanely high number.

Anytime I save a sims game it automatically calls it "Save 4803" or some other ridiculously high number in the 4000's despite me only having 5 saves at the moment. Even in the entirety of this account, I couldn't have over 50 I don't think. Definitely not 4000. My game has also been very slow (even for a Macbook) it's almost unplayable. Could these be linked? Is there some 4000 saves hidden somewhere I don't know about that are wrecking my game? how do I fix this????