Yeah it bought all 27 slots of packs, the other item being my cash stack sitting in the first inven slot. (Video here. Note: the current stack of noted jugs was from me manually pausing the script and opening then resuming)
Config Below:
https://i.imgur.com/3HagSxE.png
EDIT: Pausing the script, leaving the shop if in it, then resuming the script seems to initiate the opening of the jug packs. Can this be looked into?