BGV and offer letter

Hi all ,

I have cleared my HR around at CTS ,when I can get offer letter? and in BGV is there will be any problem if I have two uan as first company generated uan which I have not yet merged due to service history was wrong which I applied for modification accepted by Employer and pending in epfo field office and present uan is running from my last 3 companies.Although my experience certificate is real and no dual employment is there.Its just that in UAN it showing due to company's fault which I have already asked for modification.