I have seen some boats that run two tie bars (like this)? Is there any advantage to this. I would think it would be a disadvantge when you tilt the drive up, the drives would start binding because of the different lengths

No binding they are both on the same center line as the drive. I have 2 customers with them.

same centerline and distance from pivot. The set up shown will bind if trimmed uneven. Usually eats the swivel bushings, tiller arm and gimble rings.

hey, thats my boat! Actually, yes, they can and will bind on my setup. Had a incidedent this summer getting stuck on a sandbar. With the upper tie bar, and the drives trimmed up fully, the tiebar would hit my mufflers. Ended up with a bent tie bar, and bent muffler. Now I just run the lower tie bar. Only advantage i see is if you broke a tiebar, you have a backup. But then again, what if you break a gimbal, or break a ram, what if what if