I haven't shot my first BPCR match yet..but I'm confused on the time. In a 60 round match..is there a two minute sight in period for each bank and then 5 shots in 5 minutes ?? Or is there a two minute sight in period for the first bank only ?

First bank only. After that, you have to live with whatever changes The Wind throws at you.

This is why you buy your spotter out to dinner if you shoot a good score.