Is this because the the show switched to different owners or networks back then or WHAT ?

Dang I want the whole run ...

I don't get FETV, but someone told me several months ago that they don't show the color episodes.

Which is really odd.

Paramount owns the series, and it has been divided in varying ways over the years. I think MeTV and possibly its owned networks were the only ones to show all 12 seasons.

Traditional syndication for local TV was seasons 6 thru the first half of 11, later changed to seasons 6 thru 10.