If you have a single clip containing Add Edits (or scene edits), the Nucoda will correctly see the these edits when imported.
However, once graded and exported, when the the new AAF is imported to the Avid system, only the first part of clip will be seen to be graded. All the graded material is available as part of the first clip so it can just be extended or cut in from the Avid Bin.
As a workaround, when using Add Edit, make sure each segment you create is placed on a different video track to the segments beside it.
Add Edits segments separated to break links between them.
If you used Add Edit with dissolves, the Nucoda will automatically export enough material to rebuild them.