Does Not Compute!

We send things to customers all the time, both by UPS and through the mail. Lately, we've been using the mail a lot more for lightweight items as it is generally half the price until you get over a pound. So, I've noticed some weird inconsistencies in the post office pricing - for instance, we are about to send an 8 ounce package to someone in Portland Maine. I went to the USPS website and entered all the information to find out how much postage to use and found this: to mail first class - would cost 2.58 and arrive in two days. To use standard post would cost 5.60 and would take 3 days to arrive. I just can't wrap my mind around this! In what way does it make sense to have two choices with radically different prices - and, the more expensive choice arrives later. ? ? ? Maybe there IS a reason beyond email and the internet why the post office is going out of business. But to send the same package by UPS would be $10. Granted, it would get there in one day - but if we were sending an 8 ounce package to California by UPS it would cost $11 and it would take a week. (Mail to CA would take 3 days and cost 2.92) Anyway, this is a long winded way of saying that with the U.S. Postal Service - first class is the way to go - and half the price of standard. Too bad all first class experiences are not similarly priced!!