Yeah, as I was researching the rules, I found that same thing. It's also not really something that can be homebrewed away very easily because there are feats that allow you to attack while striding, like Fighters and Barbarians get Sudden Charge or Martial Artists get Path of Iron. Usually these are feats that use 2-3 actions, so they would suddenly become MUCH less useful if moving and attacking at the same time were just something anybody could do.

Honestly, Jenk's movement there is still pretty good. Barring some kind of unforeseen new enemy showing up, he shouldn't be in any danger; if nothing else, Saur will have his turn before 2 gets its turn, so even if nobody can reach it to pacify it, Saur will be able to. So as long as 4 is dealt with before the end of the round, we should be good~