If you look at CBS's O&O's they tend to be in Northern, Midwest, and or Eastern Markets* which generally has a "large" Catholic population. Channel 46 is not a CBS O&O and local affiliate's have the option to carry or not the network's programming. I can only guess that that 46 felt that they could make more $$ running syndicated re-runs, than run the service in what is stereotyped as a "non Catholic" market. CBS does own channel 69 does it ever carry "46 rejected" CBS content?
*With the exception of the California stations.