Ok here's how you do this: use the python tool to flash as many strings as you have badges, the first being the text you want, the other strings with spaces.
Tool: https://github.com/fossasia/led-name-badge-ls32

Then use the second button to cycle through the messages, it goes through individual strings and then the combination. Cycle to the last individual string so the next push starts the combo.
When the previous badge starts showing pixels, push the button to start this one. Tada.