G'day Mate,
When you move your CG back, the elevators are more efficient, ie, less weight in front of the CG, so when you move your CG back, you must also reduce the elevator throws accordingly.
I bet your trim chart mentioned, that the test for CG, is when inverted, a much smaller amount of down elevator is required to hold the nose up, that means about 1/8" down stick travel, then you will be close to the Sweet Spot. You will find that when you have found, or are close to the Sweet Spot, if you fly at 3/4 power, approx, & bank about 20 to 25 degrees, you won't need any, or very little elevator, to keep the nose up in the turn.
Also forget what happens in the Simulator, real life is not copied on a computer.

PS, a forward CG won't make the nose rise in a 45degree dive, the fact that you have trimmed at 1/3 throttle & added up trim to keep it flying, will make the nose rise, as the speed increases, in the dive.