Based on what I have witnessed in some compulsive gamblers, they usually see some of all these signs when they are gambling but they ignore it and don't bother to make a correction, they keep ignoring it until they can no longer control it because it has become a habit. At least if a gambler begins to notice all this symptoms, they should either take a brake from gambling for some time or seek a advice from someone that can help them.
One big problem about some addicted is that they don't realise and agree that they are addicted to gambling. Even when you try to show them the symptoms of addiction, they will argue with you and tell you that they are just gambling because of the love they have for the game, so don't be surprised if I tell you that those signs you think most of them saw and overlooked might actually not be pictured the same way you think they saw it.