I am not a major fan of BOG. I definitely think it's worth seeing, but I'm mixed on the food. HOWEVER...since the lunch and dinner are food are totally different experiences, I wouldn't be opposed to 1 lunch and 1 dinner at BOG during the course of one trip.
That being said, there are only a couple of scenarios where I'd double up on ADRs at a single restaurant during one trip.
1. Like the BOG situation, if the meals offer different food/experiences...I have no problem with a double up. i.e. BOG, 1900 PF, 'Ohana, etc.
2. I'd go twice if the menu is varied enough that you can get a totally different culinary experience in each visit. Sanaa is the first thing coming to mind, and we have actually done this twice in one trip. There are just so many neat things on the menu that I feel it's good to do twice. Something like California Grill, where they always seem to be changing things up, is another great one to double up if in the budget.
3. I can see doing it if it's a more reasonable spot and it's in your resort. Ex. I wouldn't have any issue with someone who was staying at the Poly doing Kona a few times.