Has this coin holder been opened and re-sealed? Or, has the inside somehow slipped between the sides during sealing?

I am not sure what to make of this Silver Eagle I recently purchased, it has several points around the body of the case that are definately seperated, and what seems like plastic, or glue, sticking out between. If the seriel number is punched in the system, it comes back as a 1996 MS 68 Eagle which is what the label says too. Has this coin been switched out ?? why would someone go to the trouble?? Did NGC quality control skip a day?? What do you make of this ??

slabswap1.