Not sure I have the entire picture of what's going on, but it sounds to me like you are reporting a strange bug.
first track - Bob Dylan second image i have have copied and pasted to the track via music bee's edit mode
second track - Lynyrd Skynrd primary image i have copied and pasted to the track via music bee's edit mode
The result on the original files
The original bob dylan track's second image has changed to the lynryd skynrd's track newly pasted primary image
The original Lynyrd Skynrnrd track all images are correct
I have double checked original tracks in the same folder
out of 17 tracks 14 have the lynrynd skynrd image (the last pasted image) is embedded somewhere most of which are the last image
1 actually has the first bob dylan pasted image as the second embedded image
You embedded an image by copying & pasting it to one song, and the result was that some of the album songs (14/17) got that same image embedded to them as well.
Have I got that right? Is that what's going on?
I'm not sure how that would happen if you were editing a single track at a time.
Is this still happening when you try it out now?