Try add to get the same item when he is used. For example, Fly Wing
add this line in the fly wing
getitem Wing_Of_Fly, 1;
The full item + script:
{
Id: 601
AegisName: "Wing_Of_Fly"
Name: "Fly Wing"
Type: "IT_DELAYCONSUME"
Buy: 60
Weight: 50
BuyingStore: true
Script: <"itemskill AL_TELEPORT,1;
getitem Wing_Of_Fly, 1;
">
},