Captioning
"It looks like the VIP 622 is preventing the CC from appearing on the TV, is this correct?"
I have the 942 receiver but I believe it is the same. The Receiver does not allow the HDTV's, (TV1 output), closed cationing feature to be turned on, (it is grayed out in the TV's menu). Instead, you must use the receivers CC set up, which causes the problem. This is not a problem with the station since when the show is replayed, parts of the CC that were missing previously show up, and parts that were on previously are now missing. This means that the CC going into the receiver work fine, but what CC the receiver sends out to HDTV is the problem.
On the other hand, the SDTV, (output TV2 on the receiver), allows the TV's CC to be used, therefore it is fine.