Last time I crawled under hull to wash & wax, which was after repairing floor and transom, I don't remember seeing holes and gel chipping which are fairly large, about the size of a dime.
I could have missed the small drilled holes, but not the dime sized gel chips. So think there fairly new ..
Now I'm conserned with fiberglass cracking around area .. Talked to my glass guy and he though another layer of glass over floor would help.
Don't know .. whole thing is just weird !