Why do my brakes "swish" and my pads wear strangely?

[tkent02]

I can firmly attest that single disc bikes do NOT pull to one side.

How could it, there's only one front wheel.
Probably half my bikes have had single brakes, it works fine.

[Nessism]

From an engineering perspective there is a torque moment that takes place with only one offset disk. In reality, the amount of force is not significant to cause any problems. Both sides win. Lets move on.

My vote is binding caliper pins. When this happens both the pins and the caliper hanger need to be replaced...which is not cheap.