I'm joining this thread to share more details about reconciliation, Janfromearth1.
The "R" means that the transaction is reconciled. It could be that it was manually reconciled through the register or it underwent the proper process. You can follow the steps shared by Joseph if you want to undo it.
Also, all reconciled transactions will be removed in the reconciliation page. Though the filter is set to All, it only refers to Cleared and Not cleared transactions.
Here are some of the articles for more details:
Comment again if you need anything else. Stay safe!
