Welcome to the forum. I have learned so much from these guys. Just hang in there and you'll soon be the husband of a happy wife.
When I cook a whole chicken in TBE, I have it standing with the breast up. I truss the wings but not the legs. As CB said, forget the olive oil - its not meant for those high temps. I never put oil on my birds. I'll just rub 'em down with kosher salt and cracked pepper. Of course, there's nothing wrong with the additional seasonings, its just that I like the taste of a naked bird. The main thing is, season it the way your wife likes it.
Over the weekend I cooked some wings, and when they came out I turn the propane tank off then turned off the BE. When I came back in a few minutes to cook the chicken, I turn on the tank and then the valve. I didn't have the pressure I needed and a small flame. It is very important to turn off the propane tank and disconnect it and then be sure TBE valve is off before you reconnect it. Then you can turn on the gas, then open the valve, and light TBE. You should have full pressure and a full flame and a chicken that gets done on time.