Yesterday I set some new NPCs to patrol. Today I checked up on them through my NPC inventory and although all the squads had moved different amounts, they had all moved a considerable distance. I have seen all squads have the 'Travelling' status both in the party page and inventory page. However, none have received any XP. Some still have 0 while others have not received any more than that with which they spawned. How often are NPCs supposed to receive XP for traveling? Is this normal?