pre-sale location?

Hello! I signed up for a few dates for the pre-sale tomorrow through my Livenation account. BUT it says in the email that there will be several pre-sale locations, and that mine is Ticketmaster. I go to Ticketmaster and it redirects me to the presale sign up on Livenation! I'm worried I won't be quick enough to buy since I'm confused on which app to go to. Does anybody understand what's going on, and can they direct me to the correct app? Thanks so much.