Welcome to JustAnswer. All communications between us must go through this website. Unfortunately, I cannot call you or email you. Nor is there a way to attach documents.
I do not know where he came up with the 12:27 a.m. on 9/13. It could be when he wrote the ticket or when he completed his work on the case. Either way it doesn't really matter. A precise date and time on a citation or criminal
charge is not required. In fact, on some crimes the prosecution can only narrow it down to a certain year so that is all that is specified.
Since you are going to hire an attorney, I would do that before I report it to my insurance company. The insurance company will likely take a statement over the phone from you regarding the circumstances of the accident and your attorney may want to be present for that. It is possible that the statement you give to your insurance company could later be obtained by the prosecution and used against you especially if there are any inconsistencies in what you tell your insurance company and what you told the police.
Regarding the 45 mph on the citation: That could just be a guess from looking at the extent of the damage on your car and the guardrail. If there were skid marks, it is possible he measured them to try to reach an estimation of speed as well. Regarding the weather conditions, that was probably just a mistake if it was still storming by the time the officer arrived. Your lawyer can obtain a copy of the weather report for that location if it becomes important later.
Regarding the reckless driving. Many officers always right a ticket for a collision. Either Reckless Driving, Careless or Inattentive Driving, or Speeding (too fast for conditions). It's quite possible your lawyer, if he/she cannot get the ticket dismissed, can get it reduced to a less serious violation or keep it off of your driving record.
If I missed any of your questions, please let me know. You are doing the right thing by contacting an attorney right away. I think your guess that the officer was angry at you because he assumed you were a drunk driver that fled the scene is probably pretty accurate. The good thing is your lawyer will not be negotiating with the angry officer, but with a (much less likely to be angry) prosecutor who is not emotionally invested in the incident.