I think the pattern is, if the item is used in a previous map, the offsets are apart from the rest. No idea why, but it was the same with the Compass and Hook Shot on the Great Sea map.
Yeah that's true and also my opinion. I called them "shared items" xD
But good news for the night here, found the last offsets and also updated the editor to support all AdventureMode Map-items now.
TerminaMap-Offsets:
Compass : 0xC5AA
Bombs : 0xC5AB
Ice Arrow : 0xC5B1
Song of Time : 0xC5BE
Song of Time (Inv) : 0xC5BF
Deku Stick : 0xC5C0
Deku Mask : 0xC5C1
Goron Mask : 0xC5C2
Zora Mask : 0xC5C3
Mask of Truth : 0xC5C4
Majora's Mask : 0xC5C5
Giants : 0xC5C6
Updated SaveEditor to V1.2, Release on github: https://github.com/nedron92/HWL-SaveEditor/releases/tag/1.2