I found the issue with the "start" command. I was using the "/b" option (Start application without creating a new window), which caused me to press ENTER twice to start the program. Using "/min" instead removes the "double ENTER" problem and does not display a separate "cmd" window, which is what I was after in the first place. Thanks to everyone who responded.
"It's not how hard you work, it's how much you get done."