unbalanced account

[Girard Aquino]

i've always tried to reconcile the qfx file i download into gnucash and 
the account history as per account. right now, i'm missing 22.08 from my 
online banking and i can't seem to find where i went wrong in gnucash. 
that is, gnucash gives me a higher balance for one of my credit cards 
than it shows online. how do i properly deal with this? should i attempt 
to find it somewhere in the transactions? if i can't, what do i do with 
it so that everything is synchronized?

i find that problems occur with the auto-matching feature of gnucash. 
sometimes it asks me for intervention during the import. most of the 
time i just settle with the default import settings it suggests, but 
there are time when i still have to go over all the transactions to see 
which should be new, auto-matched, or have already been created.

any suggestions or tips on how you guys handle these/this situation/s?