Must have been a new batch? I ordered mine on Feb 7th and got them yesterday. Manufactured date is 01/04/13.
The whole deal where a small dose make you more alert and larger dose makes you sleepy holds some water. As soon as my head hit the pillow last night I was out. Took a recommend dose this morning and I was more alert than usual (I rarely have caffeine).
Thankfully Im not in any pain and cannot test its pain relieving & anti-inflammatory attributes.