My camera, also purchased here in the twin-lens kit, has the exact same e-dial issue. Sometimes it's simply sluggish, but most of the time it's completely inaccurate and skips clicks or desired settings go in the opposite direction that I'm scrolling. Amazon also will not offer me a replacement. They've only offered me a refund. Normally that would be fine, but I purchased it during the Cyber Monday sale and anywhere else that the K-r twin-lens kit is available it's roughly $160 more. Getting a refund means that in the end I don't get the product I purchased at the price at which it was advertised. It can be sugar-coated any way Amazon wants to, but that's the end result- I don't get what I paid for.
Amazon- if a product is out of stock and somebody needs to return it then simply offer the option to put them in the front of a queue so that when the product comes back into stock they are first in line to get the replacement. Not everybody wants a refund. I'd rather wait a few weeks in order to get a working replacement for the product I paid to acquire.