DVLA/driving - panic!

been a type 1 diabetic since october 2012,the diabetic nurse told me to inform the DVLA about my condition. i wrote them a letter,got there return letter with the forms to be returned to them in 14 days. half of the questions i couldnt fill in so i filled in what i could and told them about my blirred vision. 2 weeks later i received a 2nd letter regarding certain boxes werent filled in, and a note asking me about the blirred vision ? at this stage i told them the blirred vision had now cleared due to the insulin. thinking o hell ive cocked up the form ill be banned from driving etc, 3 days later i received another letter telling me that all medical enquires were now up to date and that i would be getting my driving licence back. last saturday. i recived a letter from DVLA inside was my new 3 year driving licence, minus my 7.5 ton/ 3.5 ton mini bus entitlement. the daft part of this episode is im still entitled to drive agricultural tractors. and cars and light vans.