There should be no need to disable avi, all objects added are available in all layouts.
If the object is showing up on the wrong layout make sure it's not set to global.
If it still shows up (some objects are still a bit buggy) then just destroy it at the beginning of the layout.
[quote:25ojzkvw]and How i make more levels in Construct? (example: level 1 - forest, level 2: sea)[/quote:25ojzkvw]
um, go to layout # perhaps? Not sure how to answer that since you seem to already know how to make different layouts.