My Samsung LS23EMNKU freezes then speeds up on H&I channel.

My samsung TV/monitor model LS23EMNKU YD/ZA won't play the over-the-air H&I (Heroes and Icons -KUPT HD) correctly. The picture freezes, then plays too fast, then freezes again about every second or two. It is ONLY H&I that does this. The problem seems to be with the H&I station itself and not the channel number. I'm in Albuquerque, NM, where H&I was originally on channel 16.1 where the problem first appeared. Now it's on 16.3 and freezes/speeds up in exactly the same way. Channel 16.1 is now the MOVIES! channel, and it plays just fine.

The H&I sound always plays correctly with no pauses or malfunctions of any kind, even while the picture is stopping and starting.

I have tried different antennas, different antenna amplifiers, no amplifiers, relocating antennas, and relocating the TV. According to the TV's signal strength indicator, the signal is always 8 out of 10 bars with an amplifier. That is more than strong enough to display any other channel withouit problems. The H&I channel plays perfectly on my three other non-Samsung TVs (two Insignias and an Emerson). I believe that I can correctly conclude that the problem is in either with a format difference with H&I's signal that my Samsung TV can't process, or it's some other problem with the TV itself. Maybe it's some kind of buffering problem or just a software glitch. Whatever the reason, can you suggest a fix? Are there any settings that might help? I sure don't see any.

My Samsung TV info:
MODEL: SYNCMASTER P2370HD-1
TYPE #: EM23TS
SERIAL#: Z1U5HCLZ505632
VERSION #: ?
MODEL CODE: LS23EMNKU YD/ZA
SOFTWARE VERSION: T-EC023NUSD-1005.0

Thanks
Stan