By 'speed bonus' , you mean that it doesn't increase your dmg, or that it doesn't increase your move speed? Cause the last part isn't supposed to happen.
If it's the first one that's the problem - you might be right about having a wrong version. I have a version of a Guided-shot build with momentum/adventurer on my rogue.
Can be hard to compare dmg numbers with or without momentum, cause there's usually other affixes involved also, BUT - my dmg goes up quite a bit when adventurer is triggered, and I presume it has something to do with momentum - don't think it's all 'adventurer':
Map just loaded/no adventurer
Picked up gold/adventurer active