There is/was a common MHz .1 channel between the two digital sister stations. However, the digital stations had 8 unique SD sub-channels with different foreign networks between them, so at least 3 are no longer available OTA until next February. WNVC-DT 56 always identified the digital station as -DT 57 and mapped the PSIP data to the physical RF 57 channel, WNVC-DT 57.1, 57.2. They were presumably not supposed to do this, but I guess no one complained to the FCC.
As as side note, on their website about the shutdown, they do state that viewers will need to do a channel scan on February 17 which is something that so many other transition info pages don't mention. However, they probably should have said February 18 as WUTB 24 is likely to say on the air until the bitter end. See http://www.mhznetworks.org/how-to-wa...com_news&id=65.