You have 2 options as a database owner:
Option 1, changing item behavior to do your 2 hand + shield trick, which will also mess up your regular skill usage:
Code:
CodeName128 ObjName128 OrgObjCodeName128 NameStrID128 DescStrID128 CashItem Bionic TypeID1 TypeID2 TypeID3 TypeID4
ITEM_EU_SWORD_01_A Sagittarius Long Sword *** SN_ITEM_EU_SWORD_01_A SN_ITEM_EU_SWORD_01_A_TT_DESC 0 0 3 1 6 7
ITEM_EU_TSWORD_01_A Sagittarius War Sword *** SN_ITEM_EU_TSWORD_01_A SN_ITEM_EU_TSWORD_01_A_TT_DESC 0 0 3 1 6 >8<
Change the TypeID4 to 7 at each TSWORD entry. This will simply change the "Two Handed" weapon type item to the "One Handed" ones. And you'll notice, if doing so, "2 Handed" into "1 Handed" converted weapons won't be able casting 2 handed weapon skills afterwards.
Option 2:
Derp, git gud or realize that this is just a delayed switching "glitch" with absolutely no effect.
It is also possible doing this as a chinese Spear/Glaive + Shield, you just have to have your silkroad located/installed on a slow harddrive and not having pre-loaded shield textures, particles and meshes.