Bead Slot Bug?

void CItemUpgrade::RemovePetVisItem( CUser* pUser, int nPosition, BOOL bExpired )
{
	if( !IsValidObj( pUser ) )
		return;

	CItemElem* pItemElemPet = pUser->GetVisPetItem();
	if( !IsUsableItem( pItemElemPet ) )
		return;

#ifdef __FIX_0026
	if (nPosition < 0 || nPosition >= pItemElemPet->GetPiercingSize())
		return;
#endif //__FIX_0026

	DWORD dwItemId = pItemElemPet->GetPiercingItem( nPosition );
	if( dwItemId  == 0 )	// ÀÌ¹Ì ºñ¾îÀÖ´Â ½½·Ô
		return;

	pUser->ResetPetVisDST( pItemElemPet );
	if( bExpired )
		PutPetVisItemLog( pUser, "$", "VIS_REMOVE_EXPIRED", pItemElemPet, nPosition );
	else
		PutPetVisItemLog( pUser, "$", "VIS_REMOVE_BYUSER", pItemElemPet, nPosition );
	pUser->UpdateItem( (BYTE)( pItemElemPet->m_dwObjId ), UI_PETVIS_ITEM, MAKELONG( nPosition, 0 ), 0 ); // ÇØ´ç ½½·ÔÀ» ºñ¿î´Ù.
	ItemProp* pItemProp = prj.GetItemProp( dwItemId );
	if( pItemProp )
		pUser->AddDefinedText( TID_GAME_BUFFPET_REMOVEVIS, "\"%s\"", pItemProp->szName );
	pUser->SetPetVisDST( pItemElemPet );
	ChangeVisPetSfx( pUser, pItemElemPet );
}

void CMover::ProcessVisPet()
{
	if (HasActivatedVisPet())
	{
		CItemElem* pItemElem = GetVisPetItem();
		if( pItemElem )
		{
			for( int i=0; i<pItemElem->GetPiercingSize(); i++ )
			{
				if( pItemElem->GetPiercingItem( i ) != 0 && time_null() >= pItemElem->GetVisKeepTime( i ) )
				{
					ItemProp* pItemProp = prj.GetItemProp( pItemElem->GetPiercingItem( i ) );
					if( pItemProp )
						static_cast<CUser*>( this )->AddDefinedText( TID_GAME_BUFFPET_TIMEOUTVIS, "\"%s\"", pItemProp->szName );
					CItemUpgrade::GetInstance()->RemovePetVisItem( static_cast<CUser*>( this ), i, TRUE );
				}
			}
		}		
	}
}