You are incorrect. You only get a 5' step if you performed no other movement during the round.
dcollins said:Actually, yes. This in 3.0 where PHB Table 8-3 allows a 5-ft step with any partial action... I'll ask you to not focus on that detail. For brevity's sake, assume that the swordsman is already 15 ft. away when the round starts, if you like.
I must say, it really doesn't feel right for this set of tactics (assuming swordsman charges round 1, double moves round 2) to manage keeping the swordsman from making any attack at all for 2 full rounds, with AOOs from the polearm in both rounds, when he's allegedly within striking range the whole time.