Checked all these this afternoon...
KPXB (PAX) analog channel is on 49. Digital on 5 offers 4 subchannels:
49-1, 49-2, 49-3, and 49-4. I can only receive them at night. I suspect they are very low power.
KHOU is the CBS affiliate, not ABC. CBS network standard is 1080i. Channel 31-1 is 1080i.
KTRK is the ABC affiliate, with 720p as the network standard. 32-1 is 720p. 32-2 broadcasts ABC News Now much of the time.
KTXH digital subchannel is 19-1, not -2. I doubt it is 1080p.
KETH analog channel is 14. There are 4 subchannels on digital channel 24: 14-1, 14-2, 14-3, and 14-4. This is another station I can only receive at night.
KRIV digital subchannel is 26-1.
KHWB digital subchannels are 39-1 and 39-2.
KXLN digital subchannels are 45-1 (SD) and 45-2 (no data transmitted)
KTMD analog channel is 47. The digital subchannel is 48-1.
KNWS digital station is supposed to be on 52, according to the station engineer, but I have never received it.
KAZH digital subchannel is 57-1.
KFTH (Telefutura, ??) - Analog: 67, Digital: 36
67-1 - SDTV (480i)
67-2 - no data transmitted.