Sorry for the late reply. My wife had a tooth extraction, plus cataract surgery, then there were the holidays!
I've tried the factory re-set, and manual scanning - both of those are well-tried procedures! The upper limit of stations stored is still about "real" Channel 22.
In response to others, when scanning, it is the "real" channel number that is stored - the scan pauses for longer than usual when it encounters a "live one". I think that each TV station encodes what the display in the tuner window will show.
A brief detour. I bought another identical Samsung unit on e-bay on the 28th - a Saturday. It came Monday afternoon, Priority Mail!, from California!. The access card came with it. On plugging the new tuner in, the legend "Installation" appears on the CRT screen, along with "finding satellites failed". (This latter is not surprising, as I am connected to a chimney-mounted antenna!) Press the "Menu" button at the left on the remote, and the five options come up. The only one that is accessible, however, is "Setup". The others are "greyed out". And, under "Setup", all that is shown are satellite options.
A local quality A-V dealer with whom I spoke this morning suggested that the "Profiles" may be locked up. Directions for unlocking are in the manual, but the screen shows none of the steps shown in the manual. I think that returning the unit to the sender (whose name and address are on the box it came in), with loud complaint to e-bay is in order. E-bay stands behind everything sold there, so I should be able to get my money back - shipping charges (charged to me) were twice the seller's price!
Any and all suggestions are welcome, as always.
SSHazen in Virginia