You really can't have a wrong ammonia level with fishless cycling. The bacteria will grow on levels less than 0.25 ppm, and maximum bacterial reactivation rate is over 100 ppm. Now, don't go dumping in ammonia to over 100 ppm! For one thing, your test kit might start registering zero at extremely high levels (go ahead. test the solution from the hardware store, the ace hardware 10% solution reads zero but will burn you eyebrows off!). And if the ammonia levels are too high, it will take a very long time for your bacteria to reduce it to zero, and you will then have one huge heap of nitrite for your second stage. The whole game with fishless cycling is to give just high enough a dose to speed the bacterial growth without so much as to make the cycle longer. To date, I have not seen any dose comparisons that show what the optimal dose is (if even such a dose exists), so don't try to micromanage the ammonia level. By convention, between 2 and 5 ppm is used, because there have been lots of people who have reported that it works.
Kudos for going fishless, and for researching things first! Be patient, and it will come. Very likely 2 to 4 weeks more in an unseeded tank to get completely cycled. Hang in there.