While keying data from this source, most of the entries had years of death after the range specified by Ancestry (after 1850). I "accepted" each of those year entries using F7, but wonder if that's what is affecting my accuracy rating.
This is my first project, and except for a few unusual names, the Project Keying Tool did not highlight many of my entries as not expected. I have gone over the instructions again, and everything seems straight forward, and I'm sure that I was keying the information properly.
Regardless, the data source should be re-evaluated by Ancestry and updated to "expect" years beyond 1850.