Default Reboots with some Kit Kat roms?

Hi,

Sorry if this has been asked already, i have not been keeping up with the latest info available...

I have Installed the leaked Samsung kit kat firmware and have tried out all the Kit Kat roms available but it seems to be a hit and miss, some roms boot up fine while others give me a bootloop with a double vibration. The first rom that i tried was echo kit kat rom and it booted up fine, i then tried another rom that booted up fine but decided to go back to echo and now it is boot looping?

The roms that do work seem to be a bit buggy too.

Is this expected on these early Kit Kat roms and CWM just now and may be ironed out soon?

Thanks for any info.