Where does the Reconcile Information->Starting Balance get its number from?

[whwtan]

Hi all,

I'm asking this because my starting balance number is completely 
different from what I see as "Balance" in the Account itself.

As an example on 30 September my Balance shows 30.50, and on 31 Oct my 
Balance shows 15.00.
I try to reconcile the account with the end date 31 Oct.
The ending balance would be 15.00 but my Starting Balance is going to be 
some other wonky number [e.g. -351.98] forcing me to add a balancing 
entry. This is going to make the actual Balance in the tab itself look 
wrong later...

William