Ok, so when I look at my roster in players.aspx, they normally are sorted in the correct alphabetical sequence. In tactics.aspx, the players are sorted in a different order, and I originally thought it was because it was considering the nationality of the player in the equation, but as you can see in my team members with a last name starting with a 'V', it isn't. So, maybe it is sorting based on some internal sequence value for the nationality? eg.
It displays my players in the following order on the selectbox at the top and in the dropdowns at the bottom of the page:
Will Becerra (USA)
Józef Baszkiewicz (Polska)
Roberto Casale (Italia)
Juan Carlos González (USA)
Tom Lorenz (USA)
Joseph Pepper (USA)
Christopher Phillips (USA)
Craig Rizzo (USA)
José María Vindas (Guatemala)
Laimonis Veikipters (Latvija)
Stefano Vincenti (Italia)
Juan Pedro Ybañez (Argentina)
Not a show stopper, not a serious bug. Just not as consistent with other pages on the site.