Hi Soniah
This is the same problem I had, reconcilled up to April, then I tried to reconcile May and June and April was then out of balance.
I did delete some transactions which were left after reconciling previous months, which if they were there should not have been previously reconciled. By the way MYOB has told me that there is no alert to let you know if a transaction has been reconciled and not to delete it. They are still working on this problem. Not good.
I UNDID all the way back to September 2021 and still not getting a balanced month. I just fudged an entry to get it to balance and then had to re-reconcile from September 2021 to June 2022.
Sounds like some sort of glitch may have happened??
Shazzy