Ok I found solution!
So fiddling ;_;
Problem appears when I take full resolution image and cut parts of it in the graphical program, PS, Gimp whatever. When I cut this image and paste it, image will have same resolution as a main object whereon I cut part. That why even small object takes whole place cause its workplace is as large as maximum resolution set up in Spine to export.
When I made work place smaller, for example a bit larger than cut object, everything work fine 🙂
If someone also will have this problem, hope that this post help, if not just write to me 🙂
Thank you all for help!