I may have a solution for the CTV problem. Try
a program called Beyond TV 4 by Snapstream Media.

I had exactly the same problem with my AverTVHD
A180. Neither the supplied Avermedia TV app nor
WatchHDTV could tune CTV but they both displayed
a high signal strength. I was part of the Beyond
TV 4 beta program and I filed a bug report with
them about the CTV problem and the clever folks
over there fixed it. My AverTVHD can now tune
in CTV using Beyond TV and as far I know the program
also supports the HDTV Wonder. Beyond TV has
a free trial so you might as well give it a try.

The Snapstream guys also let me know that the
first three programs in CTV's stream are not listed
in the TVCT (Terrestrial Virtual Channel Table)
which is why they can't be tuned. So it appears
that this is not a driver problem but an application
problem and CTV's broadcast stream is still a
bit messed up. Those of you with open issues
at ATI may want to pass along the info about the
TVCT so that they can fix their app or better
yet CTV should fix their stream.

Hope this helps.