Mail app not removing old email accounts

Hi,

I have mail accounts that I made in the internet accounts section of the system prefrences and then deleted not disapearing from my Mail App. they were deleted due to duplication of a google mail account and a few fails at getting an outlook account to work.

They are NOT now in the interenet accounts, how ever do show up in mail. If you go to the mail prefrences and try and remove them it sends you back to the internet accounts in the system prefrences where theyhave already been deleted. A second Quirk is that I thought I could just disable the unwanted google account howver when I do it disables the duplicae too.

How can I get mail to behave and remove the ghost accounts? this has partly happed as I wanted all my macs to use the same accounts over Icloud so when I turned it on, it doubled up accounts on my main computer, I then removed the non Icloud shared accounts,

Thanks for the help