Your questions proves quite readily that you didn't comprehend what the sales page for these planes was trying to tell you.

To answer your questions:
1. Yes....just about everyone who knows the difference between a 747 777 and 767 noticed this.
2. Not from CaptainSim....not sure if any freeware modders have addressed this yet...you may want to google "salty mods MSFS" and read up.

Also....if CS replies...all they will do is link you to this pinned topic in both the 777 and 767 forums:
https://www.captainsim.org/forum/csf.pl?num=1638984740

Enjoy your 767 and 777s.