Data Orbital typicaly does internals for the GOP so I really wouldnt want to call them a liberal pollster. Polls they have done are good.
You bring up some good points in regards to their 2016 polling. I will say the poll showing clinton with a lead in early October was probably accurate. In AZ Clinton was doing very well in the weeks leading up to early voting, so I wouldn't doubt that se was actually leading in our state. Once voting started Trump started picking up speed in AZ.
their October 29-30th poll is about accurate with the margin. and early voting was over by that point which likely reflects in that poll.