#1.You have to be on DoW or DoM if the guildleve states so, in order to receive SP. Same goes for DoH, or DoL.

#2.You won't receive SP when you kill a guildleve target, instead you will receive a set amount at the end of the guildleve.

#3. I think they raised the behest re-entry time to 45 min. That's a speculation though.

#4. The first type, is nothing but the lock-on animation that appears around the target. The second, is a floating animation above the target that is either A. filled in, which means you are not currently attacking, or B. grey'd out, which means you are currently attacking. And the third option is a mix of both.

Right now I can't figure out what the direct target thing is. However, on my controller, I figured out how to auto-lock with L2. It might be different depending on how you set up your controller.