Hey Luna,
It sounds like you don’t have the start and the end values matched up correctly. The problem might be that it moves a value of (for example) 1.2 units each step, but that is from the contact to contact, and the foot actually stays on the ground past this (somewhere around the down position or later).
This can be a little confusing to find the problem but once you do, I know you will retain the solution so it won’t be a problem in the future.
Keep going Luna, you can do it!