avia layout builder unpredictable behaviour

I’m getting many unpredictable results using avia. For example, if I delete a ‘media element’ like an image, the fullwidth easy slider that was directly beneath it will then not fill the entire screen width of the browser (and acts as if there is an excess of padding around it) as it was doing before the simple image delete. , .. If I look at the default editor and view the text code, there seems to be nothing different from when the page was displaying correctly. ?? Another example is when adding and then deleting a few media elements while setting up a page, the entire bottom half of the site including footer will no longer extend to the edges of the browser … no apparent fix except rolling back.

this is a problem, because it means there is no predictable way to fix it each time it happens except rolling back to a previous version of the page. Once I get a few dozen pages on the site, it will turn into a big problem.

Running WordPress 4.3.1 and Enfold 3.4.3

Plugins active:
Ninja Forms – Version 2.9.28
Page Links To – Version 2.9.6
ShiftThis – Version 0.3
Under Construction – Version 1.14

I have many more plugins uploaded but inactive.

I will explain further, give screenshots or whatever is needed, but thought there might first be an easy fix to try.
Any help is greatly appreciated,

Rel