SpoilerI would guess that the facility wasn't exactly meant for tourists to enter. It would be safe to assume that there were safeguards in place in order to keep people of the wrong biology out. As usual the Doctor gets into a sticky situation he would never have been in without teleporting straight in with no precautions. All of your problems are answered by remembering that the Doctor essentially appeared in the middle of a quarantine zone and didn't pass through whatever greeters or security there was in the facility.
About the button labeling who knows what symbolism an anchor and a stream hold for the natives of whatever that planet was.