I have never known this situation ?
have you double checked the vin matches the reg ?
i would also double check the vin numbers on the car for tampering, at a guess i would suggest its got a twin
when we had the local dvla offices and there was a situation like this they would send somebody out, not that they were any good at there job, she asked me where the vin number was
The other week i applied for one with a £25 cheque, got a 2nd class letter returning cheque saying there was a mistake on it [ and i have studied and studied it, cant fault it ] unusually they did not return the v62 application with it [ they normally do] just said return the letter with another cheque, which i did same day, first class, log book came next day , which was a bit strange to say the least, if i had held out till next day, i would be £25 up, dvla, never ever rely on them, never assume they know what theyre doing, and always if its important send it recorded .