This will not be necessary, as I was just in the process of replying to my original issue with the fact that I fixed it.
What happened was I had created two simple lists using the PinballX GameManager. These two files gave me the issue I described above. To fix the issue is opened up the Pinball Database Manager and then selected my 80's list. The fields showed up correctly but when I clicked on search nothing was filtered. I then clicked on the reset button while editing the 80's list reentered the date fields and clicked on search and tables were filtered. I saved this and now PinballX currently is filtering out the tables as expected.
If you would like I can try and recreate the ini file that causes issues, save it off, then create one that works, and we can do a diff between the two to see what was causing the issue.