Creating Feature with content types imported by Feature Exporting several content types (7) from old website and importing them to new one worked perfectly.

After that i have done some basic changes in imported content types (changed widgets in few text fields (all widgets are default type)).

Now i want to make fresh backup of content types.
"Create feature" / Edit components - Content types: node
Now i can only choose "Article" and "Basic page". Content types i imported are not visible as an option.

Any idea ?
If your nodetype is already in a feature, they will not show up in the feature list.
You can disable the feature containing the nodetypes, now the nodetypes should appear.