That's strange. The 188 is more commonly known as the Duet and it's a strong performer. You didn't mention what front-end software you're using which may contribute to what's happened or how to advise a fix. I did look up Eagle, ID and found your channel 2.1 CBS
which (according to Wikipedia) has a second, low power channel (CW) on its 2.2 sub-channel
. The odd thing about the Wiki article is that the CW was on WBIO-DT at channel RF-28 (actually 28.2 which is a UHF frequency) and apparently your WBIO-DT is in VHF on RF-9, today.
Seems there may be some old information in the articles but that may be the key to understanding what's going on. Your setup files (e.g. channel scan) may have a mixed bag of old and new and the fact that you're actually tuning 2.2 which is blank makes no sense - it should be the CW network...
You'll need to either do a targeted purging of virtual
channels 2.1 & 2.2 (which may be at RF-9 and/or RF-28) from the database and then rescan or edit the front-end's database to get them correct; perform a full purge and full rescan of all the channels; or, possibly uninstall your entire
front-end and start fresh.
What makes NO SENSE is how you can tune 2.1 and watch it; then, when you hit record it switches to 2.2 and there's nothing there... Hmmm.....