Accounts appearing in Linked Accounts (Money Feeds) invalid in Account Tab

New user to Tiller and spreadsheets - after the intro webinar, I changed some account names in Tiller Console - noticed no accounts populated in Accounts tab so started manually entering them and they were auto-filling - except some were populating with the old account name
Now I have several accounts in Account Tab that have a red triangle with comment: Invalid: Input must fall within specified range.
These accounts are not showing up on the Balances Tab either -
Any help appreciated – in “beginner-ese” - Thanks