Need help! tracking and masking and clean plate aligment issue! for stop motion

Hi so i am working on a stop motion project, and i am having issues.

First to take out the wires and stuff is the best way still using mask? i try to use simple wire removal but the way the guy shot the stop motion, the wire he used is the same color as the charahcter and is from a left to right angle and for the most part simple wire was ok but since is at a angle it didn't take it out and it being the same color. . i don't know if that is leaving masking as the best option? the issue i am haivng with masking is that only at a point when it comes in to frame is when the mask comes in..  how do i get rid of the mask other wize?

Sec, there are 4 shots.. that are ment to be the same camera movment. the person didn't shot it locked down.. so the aligment for the 4 shots are not lined up right is like 97% lined up.. all the videos i found about tracking background is about fixing one shot with clean plate that 100% match..  is there a way to track something on all 4 footage and tell after effects to line them all up to match?