
I can't see what you may be talking about with these images.
The design of the reverse has some intentionally doubled columns to create a 3-D effect. I can't tell if that's what you might be seeing on this coin, but keep it in mind.
Here's an image of the Memorial showing the column behind column design and the look that the coin's designer
Frank Gasparro (FG) was trying to achieve on the columns.

ANA ID: 3203813 - CONECA ID: N-5637 Clean a coin that may be worth collecting? Please DON'T! When in doubt, leave it dirty!!
