Oh yes! I'd just spotted your reconciliation question.
I think it's important to think what reconciliation is for - it goes back to checking your statement against your cheque book, and seeing whether all the transactions matched. That's what reconciliation is for - it's for checking you haven't made a mistake. I reconcile once a month for accounts with little activity - twice a month for current accounts.
I get my statement, either online, or on paper. I make sure the date of the balance I'm reconciling to is a few days before todays date, otherwise some transactions might not show (Lidl's bad for this - money goes out days after you've been there). I go to the account, and work through the statement, after putting in the statement date and balance into the reconciliation wizard. When I've checked each transaction is OK, I press "C" next to the transaction on the far right. If there's a problem I fix it. Hopefully, when I've done all that, there's no difference between the statement and YNAB, and at the bottom of the screen it'll say the account is reconciled.
However, sometimes it won't. YNAB will tell you how far away you are from the statement total. What I do next depends on how far I'm out. If it is a significant amount of money to me, I hunt it down and put it in. If it is pennies, I'll fiddle with a transaction to make it balance - life's too short to worry too much. There's also now a way of putting in a dummy transaction to make it balance too I think.
Anyway, when the account is reconciled you press the button that says "Finish Reconciliation" and the C's turn to lock symbols - that means the data is locked, and although you can change it, you can rely on it for reporting etc with confidence.
Hope that helps.