Please forgive my lack of real terms - long long day - if you are still running into this problem, you need to click on your tracks in the timeline where your keyframes are and you will notice a very hard-to-see bar with start and end points that will be stretching beyond your keyframes. It kind of looks like what you would expect to see in after effects - grab the ends and move them to the correct start and end points. if you need a better explanation leave a comment here and I’ll reply when my brain is working better.