Hi Matadem, the problem is that your object is located too far away from the base plane. When you do the flow that same distance to the base plane will be evaluated along the target surface's normal and when that distance is large it will tend to get bunched up or spread out awkwardly.

To fix it position the object right on the base plane instead of having so much space between them.

There's a recent post here that describes this:
http://moi3d.com/forum/index.php?webtag=MOI&msg=10577.4

- Michael