As for the bell curve, try http://www.betweenwaters.com/probab/dice/dicemainD.html
Input 60, which is a vague guesstimate for how many rolls there will be. Most of the times I've tried, it comes out at least approximating the bell curve, with only rare extreme discrepancies.
Of course, just because the final product is a bell curve, does not mean that it was "fair", since timing of resources matters a lot. But therein is the kind of luck akin to Turn 5 shuffle luck in Dominion. You try to rein in the leader with trading/robbers, or you just suck it up and play another game.
Did you set it to session mode?
Roll Session Expected
2 8.33% (5/60) 2.78% (1/36)
3 3.33% (2/60) 5.56% (2/36)
4 1.67% (1/60) 8.33% (3/36)
5 11.67% (7/60) 11.11% (4/36)
6 23.33% (14/60) 13.89% (5/36)
7 16.67% (10/60) 16.67% (6/36)
8 13.33% (8/60) 13.89% (5/36)
9 1.67% (1/60) 11.11% (4/36)
10 10% (6/60) 8.33% (3/36)
11 8.33% (5/60) 5.56% (2/36)
12 1.67% (1/60) 2.78% (1/36)