Anyone know why all Sales Managers are being added to the Sales Team subtab after save of Sales Orders

I would check your customer record, they might have a sales team assigned. If the sales team is assigned, that team will be applied to all transactions.

Thank you I will check that

The only other thing I can think of would be a script or workflow. Are you aware of anything like this in your instance? Also, are you sure you're looking at the Sales Team subtab? >> If the customer on the transaction is assigned to a sales team, it appears by default on the Sales Team subtab.