I was told 2 would be delivered Saturday, but when I checked their tracking numbers on FedEx at noon, they were still sitting 1 state away from my distribution center. They made it there Sunday morning and to me Sunday afternoon instead.
Today they have updated tracking info on the site (not in my notices) to show one package that was supposed to be delivered today is the same 1 state away and will come tomorrow (which is likely). The second package they are still showing as being delivered by end of day, but detailed tracking shows it still 3 states away. Clearly I'll be lucky to get it tomorrow, possibly not until the day after.
So now I know to check status of tracking number on the FedEx site rather than paying any attention at all to their delivery/updated delivery notices. Clearly those two parts of the tracking system are not communicating any more.