Why did sab tv do that

Why did sab tv leave a two weak gap in between katlaal and sons and carry on alia????

I know katelaal and sons has to replace tenali rama but they could have started it and then changed the timing when tenali rama would have gone off air. Why didn't they do that??

I know changing timing would have resulted in a drop of katelaal and sons trp, so here's what's in my mind now - 

Why didn't they replace carry on alia with katelaal and sons?

ok there may be something behind it, but then the question is - 

if hero gayab mode on is getting late so why didn't they continue with carry on alia??