Disappearing series recordings - Digital Box

Hi Optik-Kate Okay, I'm sure this will look confusing, but i'll do my best lol, but this is from memory. So first (#1), I had series recordings set for 'This Old House' and 'Ask This old House' which I think were on PBS all repeats I still have one I manually recorded after both series disappeared that is Season 21. When I scanned through the guide for a future recording, it would let me record that, (and onscreen showed recording set) but a second press of the record button, the 3 red circles for series appeared briefly and then disappeared. No series was set. If when viewing the program on the guide, if I press the okay button it shows the program details and bottom left shows 'edit series' although non is set...