I've played this game 4 times so I still consider myself quite newbie to the game. I've read the rules several times and also grabed some rules summary. In one of them, the one made by UniversalHead (v4) I've noticed that he wrote that when opening gate and Spaw Monster during the mythos phase:
Elder Sign at Location:
No Gate or monster. If the location is colored red, there is
a gate burst, the elder sign is removed and a monster and
gate are placed as below (no doom token is placed on the
doom track however). Also, all flying monsters move.
But in the rules is (pag.9):
A. Location Has Elder Sign
If an elder sign token has been placed at the location,
nothing happens. No gate opens and no monster appears.
The elder sign has permanently sealed the gate at this
location, and no new gates can open here.
I know that Arkham is also famous for it's poorly writen rules, so which one is correct?
My doubt appeared when I saw this image from kingsport horror: