1)  HOW DOES THE GRAVITY WORK?  HOW?  I mean...I'm no expert, but it seems to be that that planet should have some issues in that area, being 2 toiuching planets and all.  Is the gravity different where the planets meet than at the poles?  Could people live close to where they meet?  If the gravity functions like Earth's for both planets, then shouldn't there be some amazing issues for where the two gravity fields overlap(I guess the Grand Stream would be an answer to that, but I think wiki said that Exile created it, and it's gone at the end, anyway...)  How could anything save a spaceship survive travelling between them?

(Guys, seriously, I know little on this subject...if anyone can offer me a scientific explanation that won't hurt, please do.)

Far less mind and world shattering:

2)  Did Sophia know that Wina lied about Alex saying her name?  I couldn't tell.  Wiki also says that Alex DID say "Sophia "and not "Euris."  I rewatched in both English and Japanese, and he very clearly said "Euris" in both, but there's also a moment before he dies where Wina is still listening where I guess he couold have said something else...