The whole CTV+CTV2 network schedules are based on maximum simsub opportunities from a Toronto-centric point of view, regardless of the viewer, their location, and show continuity. They kinda expect you to find your american network on the cable/satellite dial to be CTV-simsubbed.
Remember the february 2010 Olympics? CTV dumped all shows to /A\ for two weeks. If you were a fan of "Lost" TV series, you probably never seen 6x03 and 6x04, but CTV was there to simsub 6x05. And sometime after that, the remaining of the Lost season was dumped to /A\.
May 3, 2010, CTV brings Castle from /A\ for their remaining 3 episodes, with the strong argument that Nathan Fillion is a Canadian from Edmonton, blah blah blah, dumping CSI:Miami to already competitive monday 8pm slot, before dumping the show entirely on /A\ in the fall 2010, which switched to sundays by CBS.
If I check past TV listings, Two and a Half Men was already on CTV Two last fall while CTV was simsubbing Dancing With the Stars on ABC. When the Stars ended on Nov 22nd 2011, the Half Men was moved to CTV for december and january while CTV Two had a movie scheduled. Now that CTV can simsub The Voice and newcomer Smash post-Superbowl, why not dump again the Half Men and Castle to CTV Two ?
It's nearly impossible to receive ABC Vermont from Montreal OTA, so those who were following Castle have just been shown the middle finger by CFCF, whose hands are tied by Toronto management.
CM-3020 with CM-7777