Weird Door Key behavior

[jnz]

While trying to play Bucky's xupedas, I ran into some strange behavior of the Door Key.  I made a test level at jobytut.  Load it up and click Play.  For some reason the gates stay "on" even though you wouldn't expect them to.  Now put a new door key one spot above and to the left of the girder.  Click Play.  Now they do shut off.  And for the really weird part: delete the door key you just added and click Play again.  Now both sides look identical but behave differently.

If you reload the applet it will revert to the original behavior.  But just clicking Load and typing the level name in doesn't cause this to happen.

[Bucky]

is kudobyl a bit more solvable?

EDIT:No, it's not!  it seems that in order to have its direction reversed it must be deleted and re-formed.

[MagiMaster]

Also, if you add a doorkey with a vertical door below it, the two won't become associated.  (The door will just sit there and cause the top door to appear.)  I think this works correctly for all other directions though.

[jnz]

Also, if you add a doorkey with a vertical door below it, the two won't become associated.  (The door will just sit there and cause the top door to appear.)  I think this works correctly for all other directions though.

Test level at babarur.  Below and to the right both turn on the other side.  Above and to the left turn themselves off.

[Handi]

It's porbably related to the order in which every square is processed.
I think, it's processed from left to right and from top to bottom, thus if there are two cases: a doorkey with a door to the left, and a doorkey with the door to the right, in the first case, the square with the door will be processed first, whether in the second one, the square with the doorkey will have the priority. Hence the different results.
Same stuff happens when two conveyors try to push crates. the conveyor situated to the left will have the priority... or with pipes, top pipe will have priority, etc.
However, there are some exceptions with the upward winch and upward copier as you can see: hudabid

Anyway, it's just an hypothesis,you should refer to Kevan to know the real reason.

[Hand-E-Food]

I've never seen pre-placed doors work reliably.  I've always found it better to let the gates handle the doors.  Unless there's a very long chain, the gates close fast enough to set up a lock at the start of a level.