Dual kitchen sink disposal causes water to shoot up in non-disposal side, drain connection is horizontal
The cause of the water shooting up through the other sink is not caused by the disposal being on the lower sink. It is because the plumbing is not set up correctly.

When using a disposal you need to have slip joint baffle tee with tail piece. The baffle is inside the tee and it directs the water, that is being ejected from the disposal with force, downward.

With out the baffle the pressure is to great and the water will shoot the wrong way. 

In the photo below the water comes from the disposal on the right, the baffle is in the tee. When the water hits the baffle in the tee it is directed downwards.