a minimal example and sample log file:
[0:00:00 PM] Warning: Some files will be synchronized as part of multiple base folders.
To avoid conflicts, set up exclude filters so that each updated file is included by only one base folder.
the test folder structure is:
running this will produce the duplicate sync warning.
however, i think it should not.
1. the 1st folder pair syncs everything except "b"
2. the 2nd folder pair syncs only "b"
therefore, there should be no overlap between any of the folder pairs. therefore, there should be no warning about overlap.
either i misunderstand how the sync is functioning, or there appears to be an edge case in the warning detection that does not property detect this configuration.