Working on Impaling Extreme Damage from Start Set

[Lostroustabout42]

Relatively new keeper here with a question about the second extreme damage (impale) example from the starter set on page 19.

The example says, "If he had used a knife (impaling weapon) instead, the damage would be 4 + 4 + 1D4."

Based on how Impale is worded I thought it should be 4 (maximum damage) + 1D4 (Damage Bonus of the character) + 1D4 (extra roll for the weapon, in this case the knife).  I then looked at the Keeper Rulebook and realized my mistake and it is also maximum damage bonus just like a blunt weapon.

It seems like the impale rule could be better worded like the Keeper rulebook or perhaps just adding "maximum" to the description.  Such as, "Impaling weapons (blades and bullets) deal maximum weapon damage plus MAXIMUM damage bonus (if any) plus an additional dice roll for the weapon’s damage (1D10 + 10 points of damage in the case of a handgun, for example)."