MouseMoveRel from WeAreDevs api v2 not working as expected

So I'm trying to make an exploit that uses MouseMoveRel but I quickly realized it doesn't work as I expected it to, for example if I tried to move it up by x then move it back down by x it should go back to the starting position but it doesn't, instead going a bit higher or lower than the starting position depending on what I tried. To test it I'm just trying to do this:

wait(5)

MouseMoveRel(0, -50)

MouseMoveRel(0,50)

which is pretty much the most basic thing it should be able to handle, but it moves it up and back down further than the starting position. Is there any way I can fix this or a working alternative, or is there just nothing I can do?