Facebook FQL stream limit?

Question

I want to get the full history of my wall. But I seem to hit a limit somewhere back in June.

I do multiple calls like this:

SELECT created_time,message FROM stream WHERE source_id=MY_USER_ID LIMIT 50

SELECT created_time,message FROM stream WHERE source_id=MY_USER_ID LIMIT 51,100

and so on...

But I always end up on the same last (first) post on my wall. Through facebook.com I can go back muck longer so Facebook obviously have the data.

Why am I not getting older posts? Is there another way to scrape my history?

Thanks!