The two caches in question are the two physical caches.

Monhegan Magic (GC9216) by Anderson (2.5/5)

This is the cache we replaced, it has one DNF, but we looked for a few minutes and in a good sized search area before we found the cache, so it could still be there.

Monhegan Moonwatch (GCQ5M8) by Green Flashlight (2/2.5)

This one has been reported missing by the cache owner.

As far as what to do, that is up to you as Cache Maine noted. On one hand, it's nice that someone decides to help out. On the other hand, I hate when people hide caches they won't maintain. On the third hand, I hate to see classic caches go away.