I manually linked a transaction today (a transfer from one of my bank accounts to another). The date of the outgoing transfer transaction was 2/6 and the date of the incoming transfer transaction was 2/9 (today). Linking the transactions changed the date of the original transaction to 2/9. Now if I manually change the date of transaction on either side, it changes the date of the transaction on the other side. This has never happened with my other linked transactions, each side of which retains its original, actual date.