Patty, whatever you're doing, you're doing it right. Look at your nitrite readings. They're only 0.25ppm and your nitrates are high, just where you want them. All the while, the ammonia is getting consumed. It's perfect.
I see SOOO many opinions on fishless cycling it's crazy. One size does not fill all when attempting a fishless cycle. Everyones tank is going to be different, water is different, tank contents, etc.....
IMO (and again.. an OPINION).. you have absolutely no need to dose your ammonia any higher than 1ppm. I know for me, keeping ammo at ~4ppm (per all the "instructions") caused so many nitrites in my 10 and 29gal, the cycle stalled. Trying to bring the over-range high nitrites down to a readable level takes a crazy amount of water changes. Like several 90% water changes!!
At this point, I'd do water changes to get your nitrates down to 10ppm or so, see if your ammo and nitrites follow suite and go to 0,0 then start stocking your tank as you wish!
Joel