I believe the fact is that the Dems actually drove the voting schedule with their delay tactics.  Once the Senate had a quorum for the cloture vote, McConnell keep the Senate in session by not adjourning, but “recessed” the Senate, thus keeping the quorum in tact and the 30 hour debate clock running. https://www.foxnews.com/politics/mcconnell-designs-gambit-to-handle-other-issues-in-senate-while-advancing-kavanaugh-nomination