That’s a great question about swapping motors. In theory, it makes sense that they would be swappable, but I would expect that the cabling will have different lengths.
On ours the last 4 digits of the part number on the front wheel is 4955 and the last four from the rear wheel is 5197. If you have the same numbers on yours, it would indicate that these are different part numbers. If you have completely different numbers, then they’re just different serial number motors and could be interchangeable.
Our rear shock sits straight up and down with no gap at the top or bottom. So it sounds like something is amiss there.