The chance of prefix?

I thought prefixTableWeight in LootItemTable_DynWeight means, the chance of use this prefixtabe to these items.

And,
records/items/lootaffixes/prefix/prefixtables/prefixa01_classskills01.dbr
is a table, provide the prefix of skill bonus for Soldier/Occu/Arca, which applied to rings/medals/necklate

and records/items/lootaffixes/prefix/prefixtables/prefixa01_classskills02.dbr
is for Shaman/Demo/NB

But while I check origin LootItemTable_DynWeight records, I found some strange thing.

For necklace:
\records\items\loottables\gearaccessories dyn_craft_necklace_a01.dbr

yes, both the weight of classskills01 and classskills02 is same 150
means they have same chance to applied.

But for medal and ring:
\records\items\loottables\gearaccessories dyn_craft_medal_a01.dbr

the weight of classskills01 is 250, nearly twice of classskills02(150)
If I’m right, I think it means for medals and rings, the chance that apply the skill bonus for Soldier/Occu/Arca is much higher than the 3 others.
Isn’t this strange?:confused:

Please tell me if this is a issue or I get something wrong…:cry:

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