Alrighty, this is my 2nd time post here and I have two dimes that have caught my eye. One, I have a sneaking suspicion that it's post mint damage, the other, I'm not so sure on.
First, here's the more weird of the two


So did someone attack this dime with a power tool or do I have some kind of mint error?
Next up is a 1966 dime.


On this one, not only is the final 6 a little strange, but the border on the right side is indented a bit more than the left side of the coin. Also, there's that double line on the border on the right side that becomes uniform with the coin on the left. What do you think?
--Modern US Variety & Error Coins