Problem in screener

Today I had a problem in the screener. I was seeing incorrect prices for Close(0) and have spent time trying to figure out what I was doing wrong, but the problem is in the screener.

If I save a screen, leave the screener to run a different screen, and then come back to the first screen should I see the same results as previously? I did not. There is something stale in the environment
which is not removed until you exit and run another screen.

This also shows up as follows. If you start a new screen and don’t use the save feature, and then leave
and get the warning message you are going to lose work and ignore it and do something else. Then come
back to the screener and start a new screen. Well you would think there would be no rules, but the rules are still there from the first new screen.