Just a couple of quick comments which could help explain the different locations is that the plane could have exploded in flight, the debris therefore could be scattered over a large area. Another is that the currents move quickly in this stretch of the ocean, a report several days ago in the SMH said that strong westerly winds whip up giant swells and waves. The currents also extend through the water column as the region is so deep.
Read more: http://www.smh.com.au/national/miss...ndian-ocean-20140320-355yo.html#ixzz2wpoyZ8kQ
"Its been [13] days that things have been drifting, so whatever is found now has moved a fair distance from where it originally struck, and that distance could be 500 to 1,000 kilometres," said Brad deYoung, professor of oceanography at Memorial University in St. John's on Thursday.
"But beyond that, the individual objects that fell would have moved apart, and so there could be pieces spread over a debris field now of tens or many tens of kilometres. The predominant winds and ocean currents in this part of the Indian Ocean would generally move the debris in an easterly direction from the crash site. The speed at which the debris would move would depend on the strength of the winds and the speed of the various surface and subsurface currents active in that part of the ocean. Curl, assuming a speed of about two to three knots for 13 days, estimates that, as of Thursday, a good place to start looking for the crash site would be around 1,100 kilometres west of where the suspected debris was spotted."
http://www.cbc.ca/news/world/malaysia-airlines-mh370-the-challenges-of-a-remote-ocean-search-1.2580125