reconciliation balances now off but transactions are correct...

I reconciled my account for January. I overlooked a transaction for 0.50. I chose to let Quicken do a balance adjustment for that amount and finished the reconciliation. When I was doing February just now I saw the error. I delete the balance adjustment and chose the R next to the actual transaction. Well I do the process for March so I could see if the balances are correct and now my previous balance is showing up short. How do I fix this to make it all back right? Without going through a previous back up and doing a whole lot of things again….