You shouldn't be getting too many systemic effects like you're experiencing from Advair. It's an inhaled medication, so the effects of it stay pretty much in the lung. Yes, some of it can get into the blood stream and cause systemic effects, but it is mostly in the lung. Not saying it's not the cause of it, but I don't think it would be causing it. If it makes a difference, I also take Advair, and I never experienced anything like that, but everyone's body is different.
As for the Proventil, that is albuterol, just a brand name of it. The reason you may be hearing that it's not as effective is because of the new inhalers. I'm personally not a fan of them, it took me a little bit to get used to it and learn to use it properly, so now it's ok. Now, there is no longer generic albuterol inhalers because the FDA decided that the CFC in the inhalers was hazardous to the ozone.