How do I add metroid like aiming?

I'm making a Metroidvania, and what I've come up for up aiming just changes the bullets not fired up, to up, I've included an image of my aiming events.

I've condensed the events into subevents, but my original problem still occurs, the bullets change their flight path mid-flight when aiming up or down.

see edited post above

thanks, made a few mods to the events you showed, and have resolved my problem.