Did you have any spike of the NO2? After the ammomia spike the No2 should have risen ,then as the No2 rises the NO3 would rise up,without getting in a long post abput the nitrogen cycle,that is basically how it happens.Normal on the spikes seem to be quite indiviual,not everyone see's the excat same reading.I would just let the tank run for a few more weeks and see how it goes.No reason to be in any hurry! What kind of test kits are you using? I think I would do what MichaelTX says and take a sample to the LFS and see if they match your test results.
David