Part of the Area 51 process is finding people familiar with the network model and know how other sites on our network operate. That experience is necessary in order for a new site to function properly.
Reputation on Area 51 is extremely different than on other sites. You can easily get large amounts of it by just having been the person to propose the site or ...
The "total reputation" number will only ever match the user's reputation to the right if they have not referred any users to the proposal. The number is actually a calculation of that user's reputation and all the reputation of every user they referred to the proposal.
Why does that extra number exist? I have no idea. But that's the way it's always ...
This has been discussed before countless times on Meta Stack Exchange:
Why isn't providing feedback mandatory on downvotes, and why are ideas suggesting such negatively received?
Encouraging people to explain downvotes
Such a policy would not be enforceable and it doesn't solve the problem.
Area 51 runs on a very old Stack Exchange codebase, so changes on regular Q&A sites aren't always ported over.
One of the reasons could be (but I'm just speculating) that the change on regular Q&A sites was to make sure questions were awarded just as much as answers:
We’re changing the reputation earned from getting a question upvote to ten points, ...
Yes. See the answer here: Why doesn't Area 51 have its own Meta?, which was posted by a former Stack Overflow employee:
According to Robert Cartaino, the Area 51 Discussion Zone is intended to serve as A51's per-site meta
so its reputation system is tied to the main Area 51 site, just like with regular Q&A sites and their metas.