The new transponder map data from 4/4 now shows comments next to a few of those test channels at 103. Including...
15 *TEST 9732 11 D10 @103W 2471 FSN Cincinnati HD_HD PPV
15 *TEST 9736 12 D10 @103W 3322 HBO2 East HD
15 *TEST 9737 12 D10 @103W 3324 HBO2 West HD
15 *TEST 9739 13 D10 @103W 3336 FSN Ohio HD (D12)
15 *TEST 9753 16 D10 @103W 2347 FSN Florida HD (D12)
15 *TEST 9761 17 D10 @103W 3524 TMC Xtra HD East
Seeing (D12) next to a couple of them makes it almost certain this isn't the typical faux channel information you sometimes see in the remarks with a test channel. As for the four digit numbers in the remarks, they don't seem to coincide with a channel location where any of these new channels would be. Sure, TMC Xtra should be in the 500s, but based on the new channel assignments, it will probably be 556. We already have an SD version of the HBO2s, so we know where they will be. Same for the RSNs. It's odd that the first one also has "_HD PPV" appended.