Hi Joe,
Can you right click the channel, then select "Edit Channel > Edit Listings" and re-select the channel name with "-IceTV" on the end (even if MC says it's already selected). If you make the selection and MC prompts you to "Merge channel xx with channel yy" or "Copy listings from channel xx to channel yy" then choose the "Copy Listings" option. If the channel name with "-IceTV" on the end isn't in the list, select the non-IceTV channel, Save, then go back and select the channel again with "-IceTV" on the end.
Cheers,
Luke