i dont understand how i am supposed to build muscle memory when mm keeps changing the distance around?, am i doing something wrong or is mm supposed to do that? ive been useing 0% btw

It should do that, because it is based on the FOV and not the distance. MDH 0% means that your tracking speed is equal between different FOV's/aims/scopes.

If you prefer the same distance for e.g. hipfire, use the 360 distance method instead. This will not work well for scopes however.