1888 Cent Anomaly Or PMD Opinions Please

When I started studying the 1888's it became apparent that there was something causing damage to the lower right area on far to many coins and in the same position to be attributed Post mint Damage.
The Original post coin is an extreme of a common occurrence that if you look closely you can find on 5 to 10 percent of all 1888's in varying degrees.
There's a reason for this weakening or flattening of the denticles in this area, some will have an arched cut through the denticles.
It appears to me that the coin was fully minted before the arched cutting through the denticles occurred if so it would perhaps be from the ejection system.
In short it's to common and consistent to be attributed to PMD.
These added photo's are all of 1888 coins and I have plenty more with the same affect but to a lesser degree.
Last photo shows the only coin I found where the cutting into the denticle is not on the bottom portion of the coin.
Comments welcome, I don't think anyone has the absolute answer so I'm looking for possible explanations.
Something like this may have to be solved by consensus on a theory.
Appreciate the help.

Cheers, Bill

Until you brought up the subject, I never realized that anomaly on the 1888's, but you are the researcher and guru for that date. I just looked through about 70-80 of them and almost every one has uneven wear at that 4:00/6:00 position. I didn't find any with what appear to be shear or cut lines, but the denticles in that area all seem to be squished and fattened and elongated with a much smaller space between the denticles as elsewhere on the coin. On many, the edge or rim seems to be much more worn or compacted as well. Maybe, as Roger says, it's due to something in the ejection process or mechanism. Maybe there is something that smacks up against the coin to help it eject/slide from the chamber. I've always liked your work on the '88's and talking to you about them at shows.

If you search through the 1888 posts on this site, you will see that there is numerous repunching on any combination of the 8's. These are varieties, not errors, since they were manually repunched into the dies. There was also some MD's that affected the lettering.