Ok, I guess I'v to clarify a bit.
First of all I'm annoyed at the overuse of the word "bug". I do appreciate it that you (more than others) differentiate between "game-issue" and bug, though I don't agree with all your bugs.
Concerning the siege problem, if three stacks are given the order to siege and the besieged sally against one of those stacks, all three should be on the battle map. If they don't, I agree that it is a bug. Additionally I agree that you should have to defeat all the besieging stacks to lift a siege.
But, if you move a stack close to a city which is already under siege, spending all your MP's to get there but only reach the red zone without being able to order a (second) siege, chances are high that if the defender sallies in this turn, the second army won't appear.
If you've only had problems once or twice, can I guess that this is the number of times you've assaulted a large or huge city?
No. Well, in my current campaign there are only wooden palisades but in my last campaign I played Greece, fought almost exclusivly against stone walls and I remember a lot of close battles. Ok, point taken. I guess the larger the city, the more time you need and the more you're in a hurry.
I'm not sure I follow you. Pathfinding is a problem, but in your experience they "find their way immediately"?
Oops, my fault. My experience is that, as you already said, they (mostly Cav) have problems with their formations in cities. You can work around this when you just click on the destination point. My experience is that they will find this point without problems. Of course it takes a while for them to get there and it's always good to have an eye on them. When I order my Cav to gallop to the town square from outside the city, they will go there.
Yes, but only if there is long enough left for your three minute timer to complete before the timer for the whole battle finishes.
Ahh, okay. I did get you wrong here. Hasn't happened to me. Hmm, that sure needs fixing.
BTW, no offense intended in my first post and sorry for misunderstandings.
Generally it's good to find out the bugs that shorten the fun but I'm sure you'll agree that not every bug that is reported by patrons is a bug.

R'as