Hello Diesse, I hope you're still about, as this is a fairly old post. I have a similar situation with a relative and I'm wondering what time frame you're talking about.
My relative starts as a servant from at least 1805 to 1822 (he's mentioned in his employer's will). Then in 1839 he's on one of his son's marriage certs as a cook. Then in 1845 he's described as a steward, deceased.
Its odd that we both have the same problem with these "job descriptions", and thought it might be relevant to a particular time period. Did you ever clarify your relative's occupation?
Best wishes, Billiegirl