Bugs are never unfortunate. This isn't a closed system (like many RO servers where people are clueless, or like huge servers where your feedback just disappears in the sheer number of other people's problems) - we are fixing those bugs, so they're gone. ;P
Anyhow:
- The Vulnerable debuff transfers. That's on purpose. If both teams hold the flag for a long time, you'll start getting increasing stacks of Vulnerable, so it will become harder and harder for both teams to hold the flag. After ten minutes (if I recall right, I didn't check the source), you'll take 100% additional damage, meaning that whoever has the flag will go down really fast.
Keep in mind, the debuff isn't applied if just one team has the flag, or if a flag keeps getting returned. You'll only start receiving it if both teams continuously have each other's flags.
- About the paths, I'll look at it, however, having a screenshot illustrating where you are, and where you want to go, will make things a lot easier in making those paths more accessible.