My legs are a little sore again today, no painkillers so will take one now, having overdone it a little yesterday.
I don't really see any reason why it should be contained to a mile, but I will try to stay sensible and follow the advice I was given. Different surgeons have different protocols. Obviously I've already overdone a mile more than once, and it seems only to make me a bit sore then ok again once recovered.
Regarding one crutch, cane or two ... I notice that whilst I can get around inside the house, and out really, on one crutch, I have been walking in front of a big mirror at home and can see I am leaning over to my good leg even though I don't feel I am limping much. Put two crutches in my hands and I then have the confidence to walk better, and load my operated leg more, albeit with a tiny limp still.
So, if you're getting around fine on the cane, I would ask: how much weight do you lean on the cane? If you're putting any weight at all on it, then I would suspect it means you're limping (if only a little).
I expect a physiotherapist would be best judge though. And, besides, I'm not sure it matters much, since so many hippies here are on the cane after a week or two and it doesn't seem to have had any long term effect on their outcome ... Who knows, maybe it even accelerates recovery to normal gait.
Ultimately, like most things, a personal decision taken under advice from your surgeon, I suppose.