shuffle(), rand(), etc always returning same number

I found this very weird bug today, and I am extremely stumped on the
problem.

I was working on a static ad system. The ads are listed in an array
and I would shuffle() the array and then output the first index as the
current ad for that request. It works fine locally but online it does
not. So then I tried using rand(), same problem.

I also noticed on the homepage http://www.gamesync.com/ the Action,
RPG, etc tabs are always on the same tab, but should also be
randomizing with rand(), yet are not. But they work locally.

I really have no idea why the randomizing functions work locally but
not online. Is there some sort of setting or hidden cache function I
don't know about, can anyone enlighten me?
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