When I am saying people will hold on to their money now and spend it later, that can be interpreted as lowering the velocity now, and increasing it later. Then you will understand that that is consistent with a stable price level and an increasing quantity of goods.
There can no longer be "later" you refer to... If you don't buy today, the producer just won't sell tomorrow, because he will have to cut production and fire his staff... Is it really so hard to grasp?