After clicking on amounts in summary, some are greyed out, I wish to delete them

1

I did change an account on a sales invoice to a different GL account, but the amounts still appear on the balance sheet in the old account.

2

Can you provide a bit more information about the change you made on the invoice and what you see on the Balance Sheet and what you were expecting to see after the change.

3

At the risk of asking the obvious, are you sure you clicked Update?