Afraid not, I do not wear either a watch or jewelry. I am thinking ivanjt is partially correct in a way. I think it is something to do either with the model of the reader or how it has been constructed.
I have performed so many calibrations now that the reader side annotation is working perfectly on all settings except landscape. However, I have noticed that you must be extremely careful how you write, for me only the pen can touch the screen at all and ideally nothing else must be in contact or closer that 0.3 cm of the screen surface. Then everything works fine, if not then I get spaces.
I personnelly would say that upon reflecting maybe the sensitivity settings have be set to high and the internal wiring connections are not the highest quality. This still doesn't explain why on Dingo its was functioning well but in ermine it plays up, but as long as I obey a few simple rules I can use it with ermine and not have to go back to dingo.