Poll was in the field from Jan. 5-22, so any recent momentum from any of the candidates is going to be washed out by the fact that it's being averaged with responses from early/mid-January.
This basically means that this poll is junk. You can't stay in the field that long and get a scientific result.
It might not produce a data point that you're interested in, but it's still a scientific result, (or at least can be if done properly). It would represent the average support for each candidate over the time period in question.