still confused with presale

[www.honkeeclothing.com]

so i was hoping to goto many police shows.
1does the presale codes only allow us to purchase one show?
2and do we go straight to ticketmaster tommorrow or the police site?
3if we waited until ticket purchase time to join would we be better off?
4.i know police site gave a long explanation but how dowe get the codes?
much more complicated than other presales!
does anybody have a clear answer to these questions?
thanks