I've done inter-store shipping numerous times without a hassle.
BTW, the PC (who has always been very helpful to me) came back from lunch and called to let me know that the LCBO has apparently changed their policy on inter-store shipping. It can still be done, but she said it now has to be vetted through head office. As well, it's not a hard and fast rule, but they're trying to cut down on low-volume (1-2 bottle) inter-store shipments.
Anyway, she won't be able to finalize the shipment until Wednesday... by which time the product I want could be gone at the other store.