I suspect this occurred because I have multiple email addresses. Some of the matches I’m signed up for are on one instance of practiscore and some of the matches I signed up for are on the other instance.
Choose the account you want to keep.
Go into edit settings in the “additional emails” section add only the email from the other account you are going to delete.
Log out and then log into the account you’re going to remove. Under edit settings/ account at the bottom. Delete the account.
Now the majority of the past matches you signed up with the secondary email should follow you. They will not all but that all depends on how the match originally tracked you.