Loremaster: Secret Knowledge of Weapon Trick not stacking

[Zan]

The Secret Knowledge of Weapon trick doesn't stack with the PDK Rallying Cry AB bonus. Until taking the LM trick, Rallying cry gave +3AB from the Valiant PDK Path, now only grants +2 to the PDK char.

Live Server Character:
10 Paladin / 10 PDK (Valiant Path) / 4 LM

Steps to reproduce:
Level char to have PDK 10, and no LM trick
Cast Rallying cry
Observe +3 AB if Valiant Path
Take LM levels and take feat 'Secret Knowledge of weapon trick'
Observe AB goes up by +1
Cast Rallying cry
Observe +2 AB if Valiant Path

Expected result:
Would expect the AB bonuses to stack, so +4AB in total (+1 LM +3PDK)