Hello Aaron,
Can you record yourself doing that, in order for us to see what you are doing it?
There are many ways to make this happen
For example
If you have enabled the “Autokeying” and you do:
1) Go to frame 10
2) Set position to 20 on y
3) Change position to 80 on y
5) Go to frame 50
Then you obviously have changed your frame 10.