I can confirm both bugs.
I believe that the first bug is caused by the tiles being counted as one solid collision block; thus, the collision doesn't update unless it is hit again separately. I'm not sure exactly how this works, though; maybe an expert would have more of an idea?
The second bug happens because the tile data block looks for the tile that Self collided with. As there is no Self actor in a scene, this causes an error. This problem could probably be fixed by adding a
actor 1/actor 2 dropdown to the block.
BTW, I think your English is great.
