Yes, odd that. They could have at least made him make some effort, like diving under the Jedi's guard and shooting with his left-hand blaster.
As it is, the Jedi just stood there and took it in the chest. Must have been a Padawan.
And if those Droids were programmed to respond to Jedi tactics then they were VERY badly programmed indeed! They kept pointlessly advancing into sabre range! What on earth was the point of advancing towards that circle of Jedi? Pointless!