I don't think it's anything you are doing 'wrong' necessarily as I've read the exact same watering guidelines you are and I was using.
Rather than running water off, which in my autopsies revealed the roots concentrated at the bottom of the pot utilizing very little soil, water a little bit each day and make the roots look and find the water, thus using the soil better. It makes sense to me. He says he never has any run off and uses the good old turkey baster to lightly sprinkle the water on lightly. I assume to similate a light rain each day rather than flood, then desert, flood-desert.
Makes sense and I like it. Like we were talking about earlier in your thread, you feel like you are neglecting the plants, watering everyday will cure that! Also I find that since I use fox farm and some of the nutes are 'every other watering' I am able to feel good about getting them what I think they need. My big girls in the 2gallon pots were getting 6 cups about every 5-6 days, which made it hard to alternate watered nutes.
Anyway, I'm turkey bastin my babies now and I think it's going great so far.
I know it goes against a lot of what I've read but it makes more sense to me. I hated thinking 10% of my nutes and such were going out on the floor. Makes watering more difficult but easier on the cleanup.
Take care
Farm Hard