You are going to need to be clearer on your problem. but my first advice is always “Have you tried (after first making a copy) select all, and unformating (NOT UNLINKING) all the references, then reformating, making sure to re-engage the CWYW settings in the document.”
As a suggestion, I always unformat the references before sharing a document with a colleague, particularly if they are on a different version of word and/or a different platform, just to make sure nothing gets corrupted. It also makes the document size smaller and more manageable.
Exporting a traveling library is only of use if you want the references that someone else has placed in a manuscript. The exported library is next to useless for an existing paper. The references you insert are embedded in the paper in hidden fields. You can retrieve those from the “traveling library” a temporary file that contains the information needed to reformat the paper. Since this information is embedded in the paper, your Endnote colleagues in theory don’t need your library to add references and have them continue have all the references formatted. In practice, I find this more trouble that it is worth on most occasions.
but if you want those papers in your library, you can export the references in the paper. I recommend you do that into a new library, and to import that new library, discarding duplicates, into your main library. – but the record numbers will not be recognized by that manuscript. It will still rely on the embedded records for the information, as the record numbers to your library won’t match.