ME wasn’t 4, 95 was 4. They’re just making up numbers at this point because there’s no way 8 is 8. ME was 5 (98 was a point release). XP was 6. Vista was 7. 7 was a point release, 7.5.
You’re mixing apples and oranges. One group was DOS based windows and the other was NT. The current version numbers line up with NT. DOS based windows has been dead since ME.