How Are These Guys Getting Up Here? (Large Image Attached)

[Sumeragi 1]

Was playing on your Stock Maps 2 Chicago server, noticed that several of the opposite team have an unfair advantage reaching impossible areas on Payload Upward, how is the offensive team supposed to get past this? Demo projectiles can't reach it, and attempting to sticky/rocket jump to that height is impossible. Loaded this map on a local server and no clipped to where the engineer is standing, there seems to be a strip of roofing that allows you to move around on but there is no access way from ground level what so ever. The entire area is surrounded by a non-passable hitbox. Anyone want to explain this?:

I do have a player list screenie as well.

Image link for picture below: http://i.imgur.com/USxs2.jpg

[Krash 1,040]

Probably overhealed engineer, with several precise rocket jumps. Very impressive actually.

[Sumeragi 1]

Never thought about that, guess I'll have to test it.

[DrkEagle 15]

Is that Upward?

Probably a Wrangled SG engie then places a tele exit.

[aoCazzo 0]

here's a video of how to get there

[I can break these cuffs 2]

engineer uses his sentry to rocket jump up there and then places a teli it's no skill and not hacking.

[DrkEagle 15]

New patch released today:

Updated Pl_Upward

• Fixed ending the game mid-round when mp_timelimit has been reached
  
• Fixed several exploit areas