Nintex Newbie

New responsive forms issue

I am using Nintex Forms 2013 and wanted to start creating a form using the new response forms designer. Now what I do not get is, I have to almost identical content types, lets call them CT1 and CT2, columns is centrally managed so column A in CT1 is the same as in CT2. I use CT1 as my list content type and CT2 as my task content type.

Now when I add column A (which is a dropdown with 4 choices) from the task list columns, it has exclamation mark and it is noted that choices is missing. Dragging the list column on the other works fine.

Any ideas as to why?? This goes for all my choice controls.

This by the way isn't a problem with classical forms.