Errors On Halves Found In Rolls

I have found two types of halves that don't seem to have normal edges. The first possible 'error' (which turns up far too often to be an error) is that there seems to be no reeding at all on the half dollar. Is this just wear, or is it possible that no reeding was put on the coin? The edge seems rounded and well worn in most of these cases. However, I don't know of many circulating half dollars (an oxymoron?) and don't see how the reeding could get worn down. It could be contact with other coins, but the edge is smooth, so that seems unlikely also.

A second abnormality I have found on just a few halves, but it doesn't seem to be too rare. The copper visible on the edge appears to be on the very edge of one side. It is as though the copper got squeezed a bit too much when made into the clad sandwich.

I don't have pictures of these but if anyone would like them, I can get them on sometime soon. Any suggestions would be helpful.