Hi angel, with regards to the error on your birth month, I would suggest you to call them before having your biometrics done. For a reason that these details will appear on your biometrics ID card. I have been addressed the same manner in my letter as Mrs but still with my current passport name though. To be honest I haven't done anything about it coz I though that's how it works which I'm not quite sure of. Because on the application they've asked for the exact name as on my passport. I reckon that's where they came up with that. Hope I've help you somehow. I'm pretty sure some of the more knowledgeable members could enlighten us more..