First I thought that maybe it's outdated SAT file format but rhino showed that even the most ourdated one works good

Here's yet another sample of the same 3dm file - one exported from rhino (looking fine)

another from MoI (looking bad)

But this 3dm exports good SATs only if 3dm was created by rhino (4) if i initially create 3dm im MoI and than open in Rhino and export from there - export doesn't work correctly..