can u upload the .capx for your example? or a screenshot maybe? i have the same problem as yours but a little different. tsk! Like your problem, i have to spawn a sprite anywhere on the screen, but the sprite that i needed to spawn is at least 20, without overlapping any object... i tried destroying the sprite if it overlaps any object but i noticed that it's not a good idea... I am now trying to just find another position for my sprite once it overlaps an object. but then a new problem arise, it's not "snapped to grid"... i suppose you can imagine that. So, again if you could upload the screenshot of your event sheet or the .capx, it would be of great help to me.
thanks to your "overlapping at offset" idea too. it helped, but still right after doing that, I had a new problem right away. xD