Presumably one FPN, since you got a course for one of the offences?
Did you only supply your driving licence details in response to the s 172 notice, or also in response to the FPN? You have to do both. If you didn’t, then you didn’t comply with the terms of the FPN, hence why you’re being prosecuted.
You can plead guilty, explain what happened and ask to be sentenced at the same level as the FPN. The court might agree but you might still end up with additional court costs and a victim surcharge.