Currently on course at HMS SULTAN and have been since June 16. On 'day 1' we were told we need to sign up for the 2 years return of service which is now attached to the LETQC which is fair enough. When we signed the course was split into a 12 month common course and a 6 month ADQUAL. We signed the chit which stated our 2 years ROS would start on completion of the common course so my return of service started 2 months ago. Shortly after this we were all rounded up and told that this had now changed but the LT Commander in charge at that time promised us we would not be affected by this as we had already signed the chit to say otherwise. He's now left and 3 months into the ADQUAL they have rounded us up again and told us they made a mistake and now we need to sign another chit agreeing to the 2 years ROS after our ADQUAL has finished or we face being de-rated and removed from course even though we have completed 15 months of it. Can they remove us from course if we don't sign the chit having already signed a chit at beginning of course? Any advice that doesn't involve 'life in a blue one' would be great. I'm not currently looking to leave I'm just fed up of the Navy constantly moving the goal posts. Thanks