These have become commonplace on modern nickels, also a filled "E" on Liberty. Although mostly on Philly coins, I have seen none on the Denver coins.
You didn't really have to post so many pictures! Nice find.. I like the IFS.. all capital letters By the way it's called a BIE all capital letters, not Bie I want to share this webpage with you - http://cuds-on-coins.com/lincoln-cent-bies/