I have moved your post to your own thread since this is a completely different topic.
I need to know a few things before be able to tell you what's up.
What is your source of ammonia during the fishless cycling?
How often are you adding ammonia?
If you are still adding ammonia quite often, it is only natural you get a reading of ammonia right after you have just added ammonia even if the aquarium is fully cycled.
Nitrate should never be 0, since it is the final product of the aquarium nitrogen cycle. What you do not want to see at the end of the cycling are ammonia and nitrite.
There is no need to worry since it is fishless cycling after all. You won't hurt any fish.
