Integer seeds dont seem to work?

[TamDenholm]

I was using rand(0, 10000) to generate a seed to work with and began noticing that seeding wasnt working, after some very limited test on only integers as seeds, it seems that some seeds work and some dont when only using integers as seeds. I'm using a results parameter of 20 too.

Testing for me:
http://api.randomuser.me/?seed=252&results=20 - Respects seed
http://api.randomuser.me/?seed=2&results=20 - Does not respect seed
http://api.randomuser.me/?seed=200&results=20 - Respects seed
http://api.randomuser.me/?seed=100&results=20 Does not respect seed

I've no idea what the pattern here is?