In the option “Recipient Address Settings” I have unticked the “show contact name” but when I select the any customer for invoicing I can see the contact name. Is it just displayed there and will not be printed?
Under Invoice Labels
I have selected default payment terms 7 days, but when I select any of the imported clients, I see 14 days. Any advice?
Are you seeing it on the invoice preview, or just when creating/editing the invoice? The invoice preview is what will be sent to the client, or if a PDF is generated.
You would need to update these clients individually. This would usually default to the account setting (Account Settings >> Invoice Customisation >> Select the invoice details box and change the default terms.