Flying units repel each other

[Xbing]

I have custom units which have movement type fly, the problem is that when i move them close to each other, even though their collision size is 0, they will repel each other, until they do not overlap each other. I have tried many ways, including turning off pathing for the units via triggers, but it still happens. any solutions? thanks.

edit: just to make the problem clearer:

Before:


After:

 

[Dirac]

set their movement type to none

 

[Xbing]

if i set their movement to none, they are not able to fly. also, that symptom i mentioned still occur. am i doing something wrongly?

edit: even with windwalk on, the units still exhibit such behaviour

 

[Dirac]

Yes they are able to fly, they might not have the height, but that can be fixed if you add crow form and remove it through triggers when the unit enters the map

 

[Xbing]

yup i did that, but they are still repeling. exactly similar to my screenshots.

edit: ok i finally found out!

movement - Group Seperation. setting it to false will stop all these.
thanks for the help anyway. i am sorry for wasting a thread without trying long enough, and posting it in the wrong category