When I go to toggle a city as a 3pt objective it won't allow me to toggle it and shows a -1 in parenthese instead of the standard 0 or 1 in parentheses. Anyone know how to remedy this?
Yes. It is true that the 3 point objective in MGE and Test of Time does not work! There is no known cure for this other than to use 1 point objectives. You can can add objective points to a city's value by counting wonders as objectives. If you do that, then you can't build wonders while playing, which may matter or not.
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"There is no tiddle-taddle nor pibble-pabble in Pompey's camp."