Gas smell issues are 95% incorrect installation issues. Call your local gas company to troubleshoot. It also sounds as though you may have an insufficient supply for the demand.

There is plenty of supply. we have a 7500 sq. ft house with a 250 meter. each oven has an individual line going to it from the meter. thanks for the install tip, will call them tomorrow.

CO is odorless, whatever the smell is would have nothing to do with CO. Sounds like you may have a gas leak somewhere. 8-12ppm with spikes going up to 30ppm is perfectly fine. Household CO detectors do not even read below 30ppm, and will not alarm unless 30ppm has been maintained for 30 days. Of course there is literature out there stating lower exposure is desirable, but at the durations we are talking for baking, you are perfectly fine. Those smaller orifices are crippling your ovens.

Thanks. I have the repair shop coming next week