What you have drawn originally is correct and should work with one switch controlling one light. You need to make sure the switch is on the line side (breaker) not the load side (after the light). If it is actually wired like that you have other issues.

The Google photo is a 3way circuit. It is different in that the switches have an extra "runner wire" directly connecting the 2 switches so that both devices will operate at either end.

The problem your describing sounds like how a 3way should operate.

What you've shown me is a 3-way switched circuit. Which you have confirmed in a previous post that you do not have.

If this is an unfamiliar concept to you, and you choose to do this yourself, use a meter and extreme caution. Otherwise call a professional because this is isn't even the root problem.

Negative, that is not what it's called and you haven't heard that from anybody that knows what they are talking about. I'm somewhat sure that is a code violation, an expert can correct me. Your switch or 'safety device' is always installed on the line side of equipment. Line side being the supply from your breaker.

Either way you need to run the source to your switch. This will prevent your light socket from being constantly powered in the event that maintenance needs to be performed. This is a dangerous set-up.

Sounds like you might have a 3-way switch in there?

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