[Scripting Question] Compiler Confusion

[Black Temple Gaurdian]

So first, the relevant coding:

"Type3"            => [59,"e",PBTypes],
...
if !lastsection["Type3"] || lastsection["Type3"]==""
    lastsection["Type3"] = lastsection["Type1"].clone
end

"PrimaryAbility"   => [65,"EG",PBAbilities,PBAbilities]
...
if (lastsection["PrimaryAbility"] && lastsection["PrimaryAbility"]!="")
   dexdata[65] = 0;
   dexdata[66] = 0;
end

Now then, as far as I can tell these two shouldn't be interacting at all, let alone conflicting.
But if I set PrimaryAbility to just wonderguard it doesn't appear.
If I set it to wonderguard,wonderguard it appears.
If I then add Type3=Fire it appears in game as Normal and wonderguard is changed to Volt Absorb.

What. The Actual. Is going on here?