Your son is only about 7 weeks old right?
You should not be giving cereal in a bottle unless your pediatrician advised you to do so! What is the reason you are doing this? If it is for better sleeping or because you think he is hungrier (per your other post) this is not going to work. Babies will fluctuate in their feeding schedules.
6 weeks is a common growth spurt time, and he will want to eat more frequently. Adding cereal is only adding empty calories that will not give your son any nutrition and will actually take away from his nutrition because he is filling up on something that doesn't do him any good. This is a very bad idea without a doctor's recommendation. Sometimes for cases of reflux, doctors will advise this, but not just to give them more food.
During growth spurts it is not uncommon for babies to feed constantly, then they go back to thier old feeding patterns, and sometimes even eat less for a while. My son has always done this. He eats very regular for a while, then eats like he is starving, and once he is done with the growth spurt eats less for a while until it levels back off to normal.
Cereal in bottles can lead to lots of other health problems later in life, not to mention that baby cannot handle the thickness of the cereal (even if it seems very thin to you) and they can choke. You should really follow your pediatricians guidelines on feedings, and stop the cereal in the bottle immediately unless they are the ones that told you to do this. But if the doctor did tell you this, they should have told you how much to use. And 1 tsp per oz seems like an awful lot to me!