Abrams Line up

I don’t know how many people have brought this up to gaijin, but it’s been bothering me the more I look at it, the M1A1 should not come before the IPM1 in the lineup, with the Sons of Attila update coming out it should be foldered with the M1 and not the M1A1.
Abrams Tank Fact File for the United States Army (archive.org)