No worries, happens to me plenty!
I'm familiar with several game engines (Gamebryo, Unreal, Unity, Renderware, Ogre, as well as several proprietary engines) but I really know nothing about the GW2 engine. I'd actually LOVE to see their tool sets for world building and art pipelines. That's usually one of the bigger failings of proprietary engines is that, depending on the strength of your engineering team, so much resources goes into developing the engine that tools development suffers. It's this aspect of game design that interests me terribly, and the last thing a competing game company wants to talk about!!
Cheers,
Grimm