Synchronizing Attributes - SailPoint Identity Services

[1] At the end of the page it states…

" In the Unsynced Accounts tab, you can see a list of the accounts where the values of this attribute pair are synchronized."

… I assume this should read "un-"synchronized ?

[2] Also I find that this list of unsynchronized accounts seems to show false positives, at least for our AD source.

[a] I can pick a sample row and look at the account and identity attributes directly, and in many cases the values actually do match. Perhaps the comparison is against older cashed data which gives false mismatches ?

[b] Question: What determines which sample data is included in the “Unsynced Accounts” list ? It seems to change each time the 'Calculate Sychronization" is performed even when there has not been a change to any underlying records. Is it intended to be complete or just a small sample ?