My husband had this same issue..his company had him on a "pipe welders" visa despite him coming in as a managerial post. He had to get his job description in the visa changed in order for him to get us on family visa.This was not an easy process. People told us it would take 2 years but Alhamdullilah he got it done in 6 months! If you like I will pm you his number..you can call him & ask him the details of how he got about it.