Often when troubleshooting an LDAP Sync setup, we will need to see a full log and data export to understand the issue.

By default, the sync tool only writes errors to the log file. To change this to see a full log, edit the nlog.config file and change the line

<logger name="*" minlevel="Error" writeTo="logfile" />

to

<logger name="*" minlevel="Trace" writeTo="logfile" />

Also, it is usually preferable to be doing these tests in offline mode, and not trying to write to your site until confident with the setup. To run in test mode, change the following line in your config file from 

<TestMode>false</TestMode>

to 

<TestMode>true</TestMode>

This will prevent any unexpected changes being made to your community, and also produce an .xls file that can be checked to verify the information being synced.