Hi
bro,
generally speaking, there shouldn't be a problem. once u have written to them already, that's abt it. probably, they would confirm within a considerable time only, not imdtly.
as per procedure thay do not change ur chc until u specifically ask for it. though med can be done anywhere, passports HAVE TO BE submitted to the designated chc only. thus, ur mail to change the chc might work out well. however, if it doesn't, just before u r leaving for Ind, email them again to resend your forms.
hope that helps.
Except New Delhi is not going to wait and keep his file open for another 7/8 months until it is convenient for him.
PMM