Are you taking your Advair on a regular basis, not just as needed? It will take about 3 weeks for it to really get into your system and start giving you better control. Also, are you using your inhaler properly? You may need a dosage change but they might not do that right away. Are you seeing an asthma specialist? That will make a difference in your treatment. I know that for DS13 if his numbers aren't good he also goes on Flovent until they are in the green zone for a week. Maybe you need something additional until your numbers are better.
As for taking them both together, our dr suggested waiting about 10 minutes after taking the advair to use the albuterol. If you are having an attack, take the albuteral first and wait about 10 minutes to take the Advair.