One annoying thing about Teamwork is that it does not clean up after itself. When you teamwork a file, it makes a COPY of the PLN file (now a PLP file) and leaves the original, outdated file there. The PLN file is in no way related to the PLP anymore. The PLN will not have any of the changes made to the teamworked project in it.
The PLC is only changes made by one user the a Teamwork file. The "master" file is a PLP file.
You would need to sign into the PLP with exclusive access and save it back to a PLN file. For neatness, you should then get rid of the PLP and all its related ADM, TXT, and Backup files.
Tom Waltz