I think I found a glitch...

I was 4 turns away from building the Grand Temple in one of my cities, when it disappeared from the production que completely. I had just taken out another civ, had 3 of his cities as puppets, all of which had a temple in it. So all my cities had a temple, yet I could not build the damn Grand Temple. Turns out, it was the allied city states of the conquered civ that was the problem. I was still "at war" with those 3 city states, so i had made peace with them and BOOM I could continue production of the Grand Temple. I think the glitch is it's counted the dead civs allied city states as my own cities, since their ally civ was now vanquished. Interested in knowing if this had happened to anyone else?

Where you razing a city? Cities being razed count toward national wonders.