This number indicated in the itemlist is the item's 3D icon. The item ID is in the "itemicon.bin" file, which in your case would be 751, and the icon ID is in the "itemiconXX.wyt" files.
Look at the example below, itemicon01, the first icon is ID 1, the laktolerium powder is ID 5. The editor shows the powder ID, which in this case is 413, followed by the icon ID, which is 5.
In other words, ignore the number shown in the itemlist, which is just the 3D file, which is listed in the "meshlist" file.