I have been at this now for 1 hour and it should not take this long. I can get 2 doors activated, but the setup bugs out when I attempt the 3rd door controls....can't get past this to the 4th which would allow me into the lab. The cannon does not shoot a portal to either platform 2 or three, no matter what combination I have tried....keeps bouncing between one and 2 only.
Then you have all these other folks coming here and disrupting what I have set, which I think is what is bugging it out. I've submitted an in-game bug report for this, but I cannot proceed to get into the lab because I cannot activate the last two door controls.
Someone needs to fix this. Also if you check out the red portal you are supposed to use, it is too high up to reach even jumping. Then on one of my tries, I ended up with a red portal stuck on top of the blue portal I needed.
You all need to fix this mess. I am disappointed in how big a mess this is. All I want to do is access the lab....I'm not after the achievement.