unclear description for two-handed weapons style

[DrAzTiK]

"This weapon class allows the character to use a two-handed melee weapon and receive special bonuses. If one slot is spent on this proficiency the wielder gets a +1 bonus to damage and a -2 bonus to speed when using a two-handed weapon. A second slot spent on this proficiency gives a further -2 bonus to speed while wielding two-handed weapons. The character will also score critical hits on a roll of 19 or 20 (instead of just 20). Two-handed missile weapons (bows and crossbows) are not affected by this proficiency."

 

 

Imo, description should insist on the fact that "critical hit on a roll of 19 " is provided by the first slot spent on this proficiency.