Nam,
How old is your bottle of Future? Some say it has a shelf life, and I replace mine every 6 mos. just to be sure. Also, temperature probably does impact it. Not sure if this helps, but here's how I do it:
Temp in shop- 65-70 degrees
AB- Badger 200 single action
Future- fresh, undiluted
Air pressure- 15 to 20 psi
Light coats, first two or so
Wait 10 to 15 minutes between
last coat a bit heavier, but not so heavy it runs (hard to judge- practice on a scrap plane)
Hope that helps, maybe something there could help. Any ???, you know where to find me.