Does applying 1st day - 1st hour,changing bank account or broker change my chance for IPO allotment?

There isn't such a thing. According to new SEBI rules you can only apply for one lot or all of the lotto system's full lots. If more than one retail category subscribes, you will not be eligible for any other lot.

If you subscribe to it less than once, you'll get all the lots that you subscribed.

The lottery draw is drawn using a sophisticated computer system that cannot be altered.