Weirdest thing happening with a patch

Help !
I made a little patch to demonstrate what's happening in a much larger patch. The whole idea is to trigger a scene, but as well one clip that is not from this scene (it will help me to recall loops recorded live in clips).
If i use a regular button to trigger the action, no probs. But if i want to use a midi note input for this, it doesn't work the first time, it just triggers the scene.
It would be so nice if someone could have a look.
Here is how to test : the red menu is to select the scene. The two others select the track and clip to be played (selecting a clip # different from the scene). Note number 60 is supposed to trigger the action.
As you can see, it needs 2 hits with a midi note to trigger the action whereas the bang button just work fine. This makes no sense to me.
Help would be awesome, as this patch will be extremely important for my use.
Thank you !!
louis