Thank you for using the forum. Your prior expert "opted out" - this sometimes happens as we are called away by our own practices.
I have reviewed your question above, and it appears that you (or your wife) received traffic citations for parking violations that noted the incorrect vehicle code or city ordinance on them, resulting in the city claiming a higher fine/penalty than what is actually due.
You have tried to settle the matter informally, but this was rejected and you now have a bench trial set for the middle of next month.
It appears you have a very good handle on this (this is a very simple matter, expect your bench trial to last somewhere in the 15-30 minute range), and you have already identified both the correct statute/code section and the what the code section is that you (or your wife) apparently violated.
The only thing I would add is that if it was actually your wife that incurred the citation, it is important that she be present in court to argue her case (if she is the one that received the citation, she must defend herself), however if the citation is issued to you as the registered owner, you can defend it - just make very certain based on how the citation was issued.
I do not see a specific question in your fact pattern, but if you have one I would be more than happy to answer it, if you did have a question that I overlooked - I did try to read through your post a couple of times, but sometimes things get missed in a "Q&A" format - please let me know exactly what you are looking for.