I don't know of any tutorials off hand, and I'd need abit more info on what it's doing, like a screenshot of the UV mapper in order to get a better idea of what's going on. The UV Mapper takes some getting used to, and there are some issues I have with it that I wish they'd fix, like being able to put more than one polymesh on a single map without having to do a boolean union or exporting as an obj and re-importing, but it is rather powerful, and a lot easier to use than the uv mapper I used to use....