I saw something strange in JCS. When you "mask" a tile on what you want add some event, and press E (it is hot key for Events), go to Pickups > Ammo > and select Bounce Ammo +15 (maybe it works on +3, too, didn't test it), and when you click on OK, on tile what you "masked" and on what you want that event, write this: Gun3 +15. In game, Bouncer is on number 2. The same thing is for Freezer ammo +15. It shows Gun2 +15, and in game it is on number 3!