virginia power (or not?)

[acroyear]

Can anyone in the awareness of things tell me

1. why VA still has a separate Lt. Govenor race from the Governor one
2. if the Lt. Gov has any power at all other than "if the Governor should be unable to perform his duties..." (like the Vice Pres has Senate tie-breaking powers in the Federal Gov)
   
3. (in speculation) why VA would vote so overwhelmingly for Kaine (D) and still vote for Bolling (R) for Lt.
   
   I mean, I respect that people aren't just "voting the party line", but I can't quite figure out why...

And yesterday continued its support for a statement I made yesterday morning: I've never seen a bond referendum fail in Loudoun since I moved here.