#3, #5(a) and #5(c) are all irrelevant (the law applies regardless of what kind of car you were driving). #5(b) is silly; that you have a different opinion about the level of traffic makes no difference at all.
#2 is not something you want to mention because the law says don't enter an intersection unless, at the time of entry, you can completely clear the intersection. VC 22526.
#1 is all that's relevant, and its dispositive in your favor. VC 21453(a) applies to "[a] driver [who is] facing a steady circular red signal alone" and requires that such a driver stop either at the limit line or before entering the crosswalk or the intersection. Since you were not "facing a steady circular red signal," then you cannot have violated VC 21453(a).
I can't say that any of this is factually incorrect, but it's completely irrelevant because neither VC 21453(a) nor any other section of the Vehicle Code makes it an offense simply to "stop in the crosswalk." Did you actually read the statute before posting this?
It's a closer fit. However, as I understand the original post, the OP's car had completely cleared the intersection and was only partially blocking the crosswalk on the far side. VC 22526(a) requires only that a vehicle not enter an intersection if the vehicle cannot sufficiently clear the intersection so as not too "obstruct[] the through passage of vehicles from either side." As the OP described it, it does not sounds like he/she violated VC 22526(a) either.

