I never said that I was a hotshot.
I said that if you don't know how to remove the old host key or set strict host key checking to false then YOU SHOULD NOT BE CHARGING PEOPLE MONEY TO HOST THEM.
That should be common sense. There are FAR too many Unix hosts out there that DO NOT know anything about Unix OSes.
I don't care what these forums are for, you are ripping people off if you are trying to play sysadmin and you don't know what you're doing.
Now maybe there's a problem with the host key checking system in the transfer software. If so, that's not something that anyone in these forums are going to fix, and that's something for a cPanel support ticket.