Here is the short version. I'm all for adding more once I know what that more is to help answer said question.

I work on the road. I take my Felt ZW75 (http://www.feltbicycles.com/USA/2013/Road/ZW-Series/ZW75.aspx) with me. It rides inside my work van to be nice to it as well as having in my possession after lunch. I had a full tune up done. Then, the front derailleur required two clicks to change gears. I took it to another bike shop and had that adjusted. All happy. 

NOW, when I'm riding, and not necessarily under pressure, it feels as though the chain is skipping OR I'm changing gears and changing right back (on the rear cassette). It will do this 4 or 5 times in a row, then quit for a while. All under the same speed and pressure. It seems to not do it in some combinations, but that could be my imagination. It will act the same way on the trainer indoors as well.

I've really only ended up riding it once since the tune up, and three times (once indoors) since the weird skipping. So she is still nice and clean and oiled. In theory.

I am fully capable of taking it to yet another shop. However, I received a copy of the Barnett Manuel and a set of Park tools in a nice little toolbox for Xmas. I'd like to start learning to fix the thing myself on the road, since the whole take it back to the shop isn't exactly an option. The best answer I have found in the Barnett is either the chain, a cog, or the pawls (?!) are worn or dirty. But she really only has ~200 miles on her. 

Thanks for the help. 

Jennifer