The more posts I read, the more confused I get.

Can someone explain orchid fertilizers? I've been using Better-Gro orchid food 20-14-13, by SunBulb company. From all the posts I've read, it appears that I should be using a balanced food like 10-10-10. I've diluted this food to 1/4th strength and have been watering weakly weekly to those plants growing.
I also have a pkg. of Better-Gro Bloom Booster 11-35-15. I haven't used this at all because I'm not quite sure exactly
when to use it. It says to apply every 4th watering, but does that that mean you can use it not only while the plant is growing, but while in bud, or while the flowers are in bloom?