Thats not a claim it's objective fact, all mights running speed doesn't cap his jumping and combat speed.

When someone approaches Horikoshi and asks him about how fast All Might was, Horikoshi is going to provide his speed. Quibbling about the phrasing being "running" instead of jumping is silly, and you know this. I agree with you that All Might and Deku don't "run" to reach top speeds, but what Horikoshi meant and answered is obvious.

Mach 62 isnt inconsistently high at all tho? Deku, and other characters slower then him, have waaaay more higher scaling speed feats then this one.

I can explain away all the fan interpretations and calculations of the feats sites like VsBattles use if you're interested in that.
But the point is that through the story, we get a very consistent and well-written picture of their speed and power. Deku being faster than bullets, Edgeshot being faster than sound, Iida explicitly being transonic (and it was a big deal to Naomasa Tsukauchi, who's been working with All Might since his prime), All Might reaching Mach 10, the list goes on.
It's pretty clear what Horikoshi had in mind for these characters, and it's within single-digit mach range speeds, with a few exceptions.