Why is there 3 fuel tanks but only 2 fuel gauges?Kilstorm

Not only 2 fuel gauges, but also only 2 fuel selectors, check out the 744, I don't have MS installed here, but I recall that it has configured 4 or 6 fuel tanks, and in flight is not possible to balance fuel, or choose to burn some tanks first etc....this is other of the MS faults, I guess, a P**** would be great adressing this issues that should be fixed....Sorry for using the "P" word ;)