more likely it got poor rating because of bad scheduling, and because it was new bad ratings got it pulled.
If bad scheduling directly caused bad ratings and bad ratings caused the cancellation, it makes no sense to say bad scheduling didnt also cause the cancellation. (Something can have more than one cause)
except that bad scheduling was only coincidental, not causal.
a. imagine two shows with bad ratings, one with bad scheduling one with good. the former might get canceled while the later gets moved to a worse timeslot
b. imagine two shows with bad scheduling, one with bad ratings, the other with good. only the former will is likely to get canceled (ceterus paribus).
the truth (the reason why 'this and only this') should rather be that it is isn't quite so simple the misspeaking claimed.
I... ... huh? Try again 
To me that reads like its been through Google Translate a few times.
oops. remove the 'is'.

if 'bad scheduling causes cancellations', rather than only, and only potentially, contributing to (or even being incidental to) causes of cancellation, we should think b. impossible.
moreover, on that hypothesis we could put on our TV exec. hat, and attempt putting Colbert or South Park on at 5pm or 11:25pm, or whatever you like, and see if we can cause known popular shows with good ratings to get canceled. (note also that we haven't even spoken of in what country the malicious scheduling occurs).
also, this reminded me of this:
Peter: Everybody I've got bad news. We've been canceled.
Lois: Oh no Peter! How could they do that?
Peter: Well unfortuantely Lois, there's just no more room on the schedule. We just gotta accept the fact that FOX has to make room for terrific shows like Dark Angel, Titus, Undeclared, Action, That 80's Show, Wonder Falls, Fast Lane, Andy Richter Controls The Universe, Skin, Girl's Club, Cracking Up, The Pitts, Firefly, Get Real, Freaky Links, Wanda At Large, Costello, The Lone Gunman, A Minute with Stan Hooper, Normal Ohio, Pasadena, Harsh Realm, Keen Eddy, The Street, American Embassy, Cedric The Entertainer, The Tick, Louie, And Greg The Bunny....
Lois: Is there no hope?
Peter: Well I suppose if ALL those shows go down the tubes we might have a shot.