Are you sure the 'expiry date' does not refer to your passport expiry?I go on 4 March, return 19 March, so if the expiry date is say 5 March or after (so I have entered India before that date) I think it should be OK. But I can't see why the expiry date couldn't be be in 2030 ! and still meet the criteria. Unless the website states the expiry date (not the applicant).
Normally a visa starts on the date of entry and ends on the date of exit. I've never encountered a visa expiration date other than the date of exit.
But this site suggests it starts on the day of issue:
And the site suggests it's an official outsource of India visa processing