I’m a noob, but I’m good at reading people. The fact that you sprayed a girl’s door 10 times shows me that you definitely don’t know about proper amounts.
You need to find your sweat spot, use the info on this thread:
How to find your sweet spot… - PheroTalk Pheromone Research Forum
1-3 sprays should do it. Best to apply to wrists/neck and behind ears/chest/under arms. If used on the clothing, it could cause a -none build up (not good) so best to use it on you, which I hope gets cleaned daily 
I often apply things by one spray on my left wrist, rub wrists, then rub neck and behind ears with my wrists. I normally keep to just that, but if I go further I use 1-2 sprays on my chest/under arm areas.
Dominance issues? I never let another man out do me with my target. Unless they’re engaged or married, she’s mine. Learn to AMOG my friends 
It’s also best to ignore the girls when you first approach and get the guys to like you first, throw in a couple nags or C&F comments towards your target. Then you can say something about you’ve been ignoring their friend (your target) and ask to borrow her. Take her out the group, work your magic. The guys don’t think you’re after their girls, the girls are amazed by this same behaviour, and you end up getting your close.