There is an easy way to find it.

Download your my finds PQ and load it into the database you use for your found caches.

One of the columns available in GSAK is FCount (Found Count)

When the database is loaded and you can see the FCount column click on the FCount column header and it will list the caches by the number of times they have been found. Most of course will be 1 but down at the bottom of the listing on the FCount column there will be the ones found/logged more than once. They will show a 2 or more number in the FCount column.

You then can go and clean up the cache logs that are the problem.

I think I have three or maybe four that I have found more than once when they were moved a distance or re-listed after being archived and then re-activated.

If anyone has trouble with the above drop me a note and I will help if possible.