Here is how it works in Oregon:
You can indeed buy the right of redemption from the owner of the property after the auction, but if you redeem it, all of the subordinate liens reattach, as if the auction never took place. That is why nobody ever redeems a property (unless there were no subordinate liens and there was equity; I saw this happen a few months ago).
The 2nd lien (and all subordinate liens) has 60 days to redeem, but the owner still has the full 180 days to redeem it, even if the 2nd has already redeemed. Once the owner redeems, nobody else can redeem.
A strategy that we are using is to buy the right of redemption BEFORE the auction, then purchase the property at auction (if it is a good deal). Then the court will give us a deed after 90 days, and out title company will insure it. If it is a rehab, it takes 4-6 weeks anyway, then we can sell it and just stipulate the closing date has to be after we get the deed.
We live in interesting times!