RookieSmoker

So I know this isn't a legal forum, and this question doesn't relate to marijuana, but I know we have a few lawyers/law students on here and I'm hoping they can help. This is in San Francisco, CA by the way.
I got a parking ticket on 10/24 while working (driving). I was stopped in a bus stop dropping someone off and after she got out, i put the car in park to write down the time and check where I had to be next. In that 15 seconds a cop stopped behind me and started writing me a ticket for being stopped in the bus stop. It was 11:50pm and the ticket is $250. I already planned on contesting it since I was working and I could play the sympathy aspect working about 30 hours a week and going to school (also, the reason I was in the bus stop was because it's a 1 lane each way street and double parking would've completely blocked traffic and the bus zone is a blocked off part of the parking lane). I just realized two errors on the ticket though. One isn't very significant. The address on the ticket he gave me while I was stopped said the address was 1200 polk st while the one I got in the mail says 1210. I figured it wouldn't help if I brang that up. The 2nd error is a bit bigger. The ticket in the mail says I was ticketed at 11:50am. I was in class at 11:50am that day and can easily get my teacher to vouch. Do you think this could help? This is open to whoever can answer, maybe someone has had an experience in CA with contesting a ticket (I've never contested one before). Also, I gotta take the explanation letter in by the 8th so there's a short time frame. Thanks in advance.