1966 Lincoln Penny Date Stamp Error

Hi, I'm new to the forum and was hoping someone could identify what type of error this is and what's the cause.

This topic has been locked for pictures of a screen. These are almost always terrible and against the rules. We are locking this topic to prevent posts with "We need better images". You will get many more quality responses when there are quality images in the first post of a topic. Please start a new topic when you can upload non-screen pictures. If needed, you can use the testing forum. When you start a new topic this one may be removed. So don't panic if you get an email that your topic was removed; it's only this one.

First two lines of the Upload Form