Are Shaft arcade/sniper stats reversed?

How can it be correct? Damage in sniping mode depends how long you let the power bar go for, and damage in arcade mode is a fixed value, yes? But my M1 shaft MU box says:

Damage in sniping mode: 167.8

Damage in arcade mode: 39.2-45.4

Clearly sniping mode should be a range and arcade mode should be a single number. Otherwise, in sniping mode what is the power bar for? And in arcade mode what determines how much damage is dealt?

"Clearly sniping mode should be a range and arcade mode should be a single number."

It shows the maximum amount of damage you can deal in sniping mode.

"And in arcade mode what determines how much damage is dealt?"

The distance between you and your enemy. The closer you are, the more damage you deal.