The soil you are using is considered to have a lot of nutrients already in it so you may not have to add very much to it at all. The every two week bump might be a good plan. Hence, just curious where you picked up the feed every two weeks advice.
I don't remember exactly, but from what I recall, it was from a forum discussing nutrient schedules when using nutrient rich soil, such as OF. I believe that forum also said it's not recommended to feed nutrients for a few weeks when using nutrient rich soil since the soil should be enough to sustain a plant for a certain time frame. Is this information accurate?