Whether you pay your bills online, or the old fashioned way using checks, stamps, and envelopes- the process of "paying bills" doesn't happen instantaneously. Someone has to sit down, and cue up the payments (or write the checks). Sometimes this can be such a pain because the electric bill is due on the 22nd, the phone bill is due on the 30th, the car payment is due on the 1st, and the Credit cards are all due on random dates like the 7th, and 11th.
You know that you can change the due dates of your bills right?
You don't have to sit down 13 times a month to send off bills one at a time, or keep track of a laundry list of bills and due dates (always wondering and double checking- did I pay that one???). Most companies will let you change the dates of your billing cycle so that the bills come during the portion of the month that YOU want them to. Lots of times you can do it online without even having to wait to talk to anyone. It might throw your payments off for a month (if you have to pay a pro-rated bill to get on track), but after that it will be so much easier!
I try to get all of our bills paid within the first several days of the month (because we only get paid once a month anyway), and then I don't have to think about it at all for the rest of the month! The bonus is that if you get all of your recurring bills out of the way early, you can budget the rest of your spending more accurately.