Yup, those are two consecutive screenshot and yes, those staffs are absolutely identical (still in my inventory, its vendor thrash anyway).
When it droped? Act 3 NM - Lightening fires or start of raisening catapults.
How it dropped? Killed elite shaman (I think or some elite simply), dropped this. Continued and few moments later killed that small green guy (peons I think? those that can be ressed by shamans). And another drop.
I was slightly suprised as even tho I have 100+ MF it usually doesnt happen that these guys drop anything at all. Imagine suprise when I saw absolutely identical staff.
I do have lags, like pretty much everyone else, but not during this time. So its not lag. Coincidence? Doubt that. I seriously wonder how drops work, cause apparently they are not that unique as expected. Some time ago, two belts with same name dropped in one location too. With same stats, just different values. Still even that is tiny bit strange...
If Blizzard wants those two staffs, feel free to take them, if not I will vendor them in week or so.