That is what happens. When the second stage reaches the top the first stage then starts to raise.
I found the data plate for the mast. The model number is SS33.00-4.50 1219-1356883 The serial number is B603 (printed) B352.1 (stamped)
I was looking for the flow valve, I don't see any vale at the bottom of the first stage cylinder. I do see plumbing that goes to a box on the fire wall (for lack of a better name) and there are two lines that go to the two second stage cylinders. Could this be the location of the flow valve?

Thanks for your help.