@elated You are not alone. I just checked my account this a.m. and a January 9 small easy pay is indicated as overdue.
I found my order confirmation e-mail for that item and have e-mailed the Social Team to see what is up.
Had the same problem with an early January smart payment on their sister company--Zulily--under the Qurate family. And yet, larger amounts for Z around the same date DID go through!
Hope this isn't going to be their "new normal" or folks really won't be purchasing here.
The Social Team is very professional so I'm hoping I get some sort of explanation after they've investigated. I certainly don't want to pay it and then they "correct" their system and I wind up paying an installment twice.