1989-S Proof Lincoln Memorial Cent Error? (Prestige Set)

This is my first post (and am newbie at collecting), and I found something, but not sure what to call it or if a legitimate error.

The 1989-S Lincoln Cent that is part of my Prestige Proof set looked like it had a "dot" before the E in E Pluribus Unum. On closer inspection, it has 2 ridges that run from the S in States downward through the E and to the dot between the E and Pluribus. The lower ridge peaks just before the E, making it look like a dot since it is finished and catches the light just like the dots. The upper ridge also makes a distortion of the top of the E.

Please look at the pictures and comment.

Since I know little about collecting, does this anomaly increase the value of what is otherwise a beautiful proof - or should I want my money back for the set?

Thank you very much in advance!