It wasn’t random, the same set of controls showed up every time and others didn’t. The UI was divided into three sections each contained within a group box. I could imagine how strange he must have thought it to be. But it had already happened to me before. And when he asked me for help, I couldn’t help a smile (: If you had readthis post carefully enough, you would have noticed a small remark on the group box that I had made. "Add these three static controls into a group box, name the group box "Process Info". Remember to create the three static text controls before creating the group box. I was trying the other way around, by creating the group box first, the text controls would not show up, they were hidden behind the group box." And that was the exact problem in this case too. He had added controls to the UI in a particular order, or rather, in no particular order. So all the controls added before the group box showed up correctly and others didn’t.
As Gato pointed out, this problem occurs because of the Tab order (also called z-order) of the individual controls. See the ‘Comments’ section below.