Alphie wrote:1. Bella has a knack for predicting outcomes. She makes a comment to herself about Jacob turning his back on his birthright as pack leader, and this left Sam Uley "to act as the chief of legends and magic now. . . ." Why do you think Bella didn't finish her thought?
Honestly, I'm not sure. Her thoughts flowed from that, straight to Billy Black, with whom she's not had that great a relationship with. I suppose she could be wondering how things would be, had Jacob accepted his role as the alpha. Perhaps she felt Jacob should accept his role, seeing as he's just as much a part of the legends and magic as the others are.
Alphie wrote:2. Why do you believe that Sue Clearwater chopped off her hair? If she was so uncomfortable at the wedding, why did she attend?
Bella believes it's a show of solidarity with Leah. I think that's highly probable, what with both her children being werewolves. As far as her attending despite being uncomfortable, I doubt she'd willingly let Seth go by himself, werewolf guards in the woods or not.
Alphie wrote:3. Why does it bother Jacob more that Bella plans on a real human honeymoon than her pending transition in a week or two?
I think at this point he's accepted the fact that Bella will be turned. But this news upset him because he believes that she will be physically hurt or worse if she's still human (during the act), and he can't accept anything that might hurt her.
Alphie wrote:4. There is no description of what car was decorated and used for the honeymoon get-away. What car do you believe they used?
At first I thought it was Edward's Vanquish- but I doubt he'd let anyone do that to his car. It can't be Alice's Porsche. I also doubt it's Bella's Guardian. It wasn't a Jeep, so it's not Emmett's, and I doubt they'd use Rosalie's M3. That leaves the Volvo, and Carlisle's Mercedes.
Just speculation here, but they mentioned that Jasper used a car to pick up Renee and Phil from the airport. He would probably have used the Mercedes (more luxurious than the Volvo, plus the window tint). He also brings the car around for Edward and Bella before they leave, so I'm leaning towards Carlisle's Mercedes. Pure speculation, of course.

Alphie wrote:5. Why is Bella so hopeful when she waves goodbye and sees her families on the porch?
I think she's hoping that, after her change, she can still have both her families (human and vampire) like that, the way they were on the porch. I believe she's wishing that once she's a vampire, she can still have a relationship with her human families and friends.