This happens pretty frequently with new users. When you enter the print and cut dialog box, the machine moves to the first registration point and then waits for your input. If more than a few seconds pass without any information being sent to the machine, the computer just drops the connection and the only way to start again is start over. To get around this, once the machine starts moving, just press the left/right arrows while you think about what you need to be doing. This will keep the connection active.
This is only a "learner" experience. Once you have done a couple of print and cuts, it becomes second nature and you will be so quick you don't even notice it. You can also learn about all the keyboard shortcuts in the print and cut dialog box. I actually have my cutter in a different room than the computer. I keep a wireless keyboard with the machine. When I do print and cut, I just go over to the machine and use the wireless keyboard to do everything and it is super fast! It just takes a little patience at the beginning. You're doing great!
And you did starting a new post perfectly