extremely annoying failure

[Jack]

First, I'll say there was no actual data loss, just loss of more time  
than I'm happy losing over the past two days.

On 30 June, I saved and backed up my data file, and began my end of  
month reconciliation of my investment accounts.  Yesterday, I had  
completed reconciliation of one account.  I thought I had saved, but in  
retrospect (i.e., looking at available files) obviously not, and that  
was my fault.

Today, I completed reconciliation of a second account, and again  
(unusually) neglected to save the file.

I then started on a third account.  These are all investment accounts,  
and my broker sends two transactions for a dividend reinvestment.  In  
the Investment account, I convert one to a reinvestment transaction.   
The other transaction only appears as a deposit in the brokerage  
account.  In this case, I reconciled the investment account first, and  
then went to the brokerage account.  I reconciled the account before I  
deleted three of those "extra" transactions, which left me with an  
incorrect balance, too large by the sum of those three transactions.    
When I saw this, I deleted those three transactions, and only then  
noticed the "wrong" reconciled balance.

OK - I figured I could undo several steps, going back to right before I  
did the reconciliation.  Well, I did undelete those three transactions,  
but at that point, the "undelete" button appeared disabled.  I could  
push it, and the window re-displayed, but nothing changed.  Multiple  
further presses did not remove the "now wrong" reconciliation banner  
from the ledger.

Is reconciliation not able to be undone, or have I discovered an actual  
bug?

Unfortunately, I neglected to save a copy of the file in it's "bad"  
state, although I can probably recreate it if necessary.

Any thoughts?

Thanks.

Jack