I'm trying to get a list of the 10 oldest users. This is the endpoint I'm using:

http://api.stackoverflow.com/0.8/users?key=(key)&order=asc&sort=creation&pagesize=10&page=0

According to StackOverflow, they should be coming back as:

• Community
• Jarrod Dixon
• Geoff Dalgas
• Jeff Atwood
• Jon Galloway
• Joel Spolsky
• Eggs McLaren
• Kevin Dente
• Sneakers O'Toole
• Chris Jester-Young

However, the JSON I'm getting back has them in this order:

• Community
• Jeff Atwood
• Geoff Dalgas
• Jarrod Dixon
• Joel Spolsky
• Jon Galloway
• Eggs McLaren
• Kevin Dente
• Sneakers O'Toole

What gives?

edit

a bit more information: Jarrod, Geoff, Jeff, Jon, and Joel all have the same creation date (1217514151, or Thu, 31 Jul 2008 14:22:31 GMT). So perhaps a better question is:

Is there defined behavior for sort ordering when two attributes have the same value?