I was looking through an roll of common wheat's I had in my safe in a clear whitman tube. I noticed one side is shiny, and one is dull. I know for sure it did not go in the roll like that.
Looks to me like it was in a bank roll for a while, with the obverse on the outside. Exposure to the outside caused it to look that way, with the reverse staying in a higher grade.
No, it really wouldn't. Just make sure that you keep your tubes in a safe, dry environment. Silica gel is your best friend.
I have a small holed tin of it in my safe. I also keep my safe open 2-3 times a month to let air out.
Perhaps your coin was once in a coin folder. The reverse would have been protected but the obverse could have been touched when it was pressed into the hole and the obverse could have been touched over and over again as the coins were viewed and additional coins were added to the folder.
That cent was an end cap to the roll. The oxidized (dull) side was exposed to the environment while the shiny unexposed side was protected from oxidation within the confines of the roll.
