Why did Facebook bill me twice today?

I'm running some Facebook ads and only spending a few dollars a day. I've been doing this for some time now.

My Billing Threshold is listed as $250.

Early today I got a bill from FB for like $10 and then I just got another for like $4. Anyone have any ideas on this?

I don't think they'd be getting ready to ban me. I've been running the same ads for some time and I'm not doing anything blackhat. Just trying to get Page Likes.

I'm wondering if it's because it's the end of the month maybe they're trying to get every last bit of revenue they can.

Don't worry, it is due to end of the month. Billing has usually got nothing to do with a ban.