Look at the TOP of the table, it says "account expires: " The internet would be a nicer place if people would look for 5 seconds before asking questions instead of 0.2 second.
"1 day pending" means that Blizzard gave you a free day after your last payment and before your next one.
I think it was some time in November when the servers got screwed for a day or so and they gave out an extra day to those affected. 60 days were purchased on 11/12 and would normally expire on 1/11 (30 days in Nov, 31 in Dec). 1 day was given to 1/11 (the end of your current paid time), thus pushing the next "due date" to 1/12.