Coins won in auction, Errors?

Hello everyone,
  My name is Kris and I'm new to the forum and pretty new to coin collecting as well.  My husband and I were at a storage auction yesterday and I found a bag of pennies mixed in with some other things we won.  When we started looking at them we noticed a lot of them appeared to have various errors.  So far two of them have completely stumped us and the coin shop in our town has proven to be less then honest so we avoid them at all costs.  I was hoping you might help.
The first one is stamped correctly on both sides, but there is an portion on the front over Lincoln that has the memorial from the back stamped on top of him.  We weighed it, and it weighs 2.5g if that helps.
The second one looks like 2 stuck together during production.  Most of each side is plain, but you can faintly see where it was stamped and the stamp doesn't appear to be something done by someone as a joke ( or whatever reason people waste their time messing up coins ).  For instance, the one part of the coin says, "United States of" and the coin the second coin says, "America".  You can also see the memorial carried across both. 
Like I said, I'm VERY new to this.  I started collecting wheat pennies about 6 months ago and just got interested in other pennies and coins.
I appreciate any help and look forward to learning more from all of you.

I'm not the best on error cents by no means but in my humble opinion......  I feel that the 1994D your posted is a normal cent with glue or some other substance stuck to the coin and when you press another coin to it, it would leave the depression in the substance from the other coin.

Thank you very much for helping me out on this.  I think people need to get a life and stop wasting it altering coins.
Thank you again!

those are damaged coins

K S