Text Video Track in Editor

Hello all. I'm new to HitFilm Express. I'm trying to mesh a voice recording with a basic background and then add text to denote the person talking. I added text and it automatically installed it as a video track. I took those tracks and sliced them to those designated people's talking timeframes. Now I need to add additional names and when I add text it's putting it on those other text tracks even if they are locked.

So, how can I add new text video tracks?

Thanks,

John