When creating a Pathfinder Figher of the Two-Handed Fighter archetype, with Weapon Training in Heavy Blades, no attack/damage bonuses are added when using a Falchion (by contrast, it is correctly added for a Greatsword). As far as I can tell, both are part of the Heavy Blades group and the Falchion is definitely a two-handed weapon (per CRB Table 6.4 on 143).
It appears the file data/pathfinder/paizo/roleplaying_game/core_rulebook/cr_profs_weapon.lst is missing a few TYPE markers in the weapon groups blocks starting at line 114. Specifically:
1. Falchion is missing Weapon Group Blades Heavy TwoHanded
2. Curve Blade (Elven) is missing Weapon Group Blades Heavy TwoHanded
3. Chain (Spiked) is missing Weapon Group Flails TwoHanded