Overflow servers are created when the zone or world you're attempting to join is full. They're basically just another zone instance that's made. When you try to join a world/zone that's full, you will automatically be placed in an overflow server. You can earn XP and other rewards as normal on an overflow server, and it will consider you "in queue" for the "main" zone and once space opens up, it'll ask you if you want to join the main zone.
You will receive 3 options when the main server is ready to accept you:
- Travel - This will take you to the main server
- Reenter queue - This will allow you to remain on the overflow server, placing you back into the queue. You will then receive the popup again when there is room on main.
- Leave queue - This will allow you to remain on the overflow server without constantly receiving a popup to ask if you would like to stay.
Additionally, if you let the timer on the popup run out before you make a choice, it will default to "Reenter queue", leaving you on the overflow server, which will give you a chance to leave later.
Both of the links you provide say "Stacks in duration". According to the Effect Stacking page
Effects stack in one of two ways: in intensity or in duration. For
example, multiple stacks of bleeding, which stacks in intensity,
increase the damage dealt over time, and multiple stacks of
regeneration, which stacks in duration, increase the duration that the
healing over time lasts.
It also says
The best intensity lasts for the cumulative duration
Originally I interpreted this to say higher damage trumps lesser damage but increases duration which is incorrect. Based on info I found at Guild Wars Insider the answer becomes a little more complicated.
Multiple duration effects are applied in sequence for their applicable lengths of time. In this example lets say Chilled got applied then Crippled within 10 seconds of each other and both effects are for 60 seconds in length. Chilled would get applied to you for 66% reduction, Crippled would wait until Chilled had finished then immediately get applied to you for the 50% reduction for another 60 seconds.
The blog post at Guild Wars Insider has a nice graphic to show how this stacking occurs if my explanation is confusing.
Best Answer
Yes. Your downed pet will seek out a nearby player and begin to revive them.
This has minor benefits, as defeated pets will not be targetable, and so the reviving cannot be interrupted (though since pets revive much slower than players to begin with, the tactical benefit is minimal).