January is a specific range of dates, all days equally valid, in light of the times the orders were placed. That is not what is happening.
Imagine: you line up in line at an Apple store waiting for the store to open to get the latest i-something. An Apple employee comes out and says, everyone to the lamppost will get a device by the end of the day.
Then line starts moving, but then an Apple employee comes out and inexplicably pulls people out of line behind you, and you see them exiting the store, with their new device. When you question what is going on, Apple says, "we are filling the orders in line;" and nothing else is said.
The some person behind you says, " What are you griping for? They said we would all get one by the end if the day."
Right.