Hello - I lurk often but rarely post anything but here - I have those exact same bikes - from the Specialized Hardrock right to the Dolce. The Dolce seems to come with shifting issues. I had the same problem. My LBS kept fixing it (once they stopped telling me it was all in my head) but it would go back to either losing the chain going from the granny gear up or just not wanting to shift into the highest gear. I finally switched to a compact double and all problems went away (of course). I hope you have better luck than I did.