The movement is instantaneous and isn't among the effects that are noted to last.Yes, you can. Cast the spell to shape the water into simple shapes. A cube is a simple shape. Lasts an hour, does not require concentration, the 5 cubic feet rule still applies. Cast the spell again to freeze the water. Also lasts 1 hour. Cast the spell again to form another 5 cubic feet of simple shapes on top of the frozen shapes. Repeat so long as you have water and it's less than an hour since you started. All RAW.
I'd certainly say that you can instantaneously move a 5ft cube at a 5ft diagonal so that it falls into a different area but, RAW, this feature is limited. You instantaneously move the water and then spend six seconds working towards whatever you're planning for your next action.... can you consecutively move a 5 ft cube of water upwards on repeated rounds and freeze it?