Glancing through the XML the GustOfWind_Ability game modifiers do not match the GustOfWind Spell. Each spell is supposed to do the same thing, but GustOfWind_Ability has

<GameModifier>
    <ModType>TacticalUnit</ModType>
    <Attribute>TargetMovesBack</Attribute>
    <IsForSpellResist>2</IsForSpellResist>
    <Value>1</Value>
</GameModifier>
<GameModifier>
    <ModType>TacticalUnit</ModType>
    <Attribute>TargetMovesBack</Attribute>
    <IsForSpellResist>1</IsForSpellResist>
    <Value>1</Value>
</GameModifier>
<GameModifier>
    <ModType>TacticalUnit</ModType>
    <Attribute>TargetKnockedProne</Attribute>
    <Duration>1</Duration>
</GameModifier>

Now, I believe the bolded <IsForSpellResist> is in error and should be removed (this will match the GustOfWind) spell the player can get from Aeromancy. I suspect that the Ability is either knocking units prone or moving them back when resisted (2 spaces).