Why are my morphs not working as expected?

Beat

I modeled this hair piece on blender, then I modeled some morphs but I have this problems:

First my morph only work correctly at 100% value. Any less and the morph affects the opposite side of the hair for some reason. This part was not affected on my original blender model so the morph shouldn't take information from that part. It looks like this: https://imgur.com/a/aIs3b1D

Second The morphs only work alone if I try to combined them my model gets all messed up like this: https://imgur.com/a/aK2rh8D

How can I fix this.