Text-to-speech settings changing on their own?

[e_canuck]

I use Text-to-Speech a lot on my phone and tonight I found the settings were suddenly changed on their own and were very difficult to get back to what I had before. The "pitch" (highness or lowness of the voice) had changed, and perhaps the speech rate, too.

It took a long time to try to get the voice settings back to where they were (the slide button hides behind my finger when pressing and moving it so I can't even tell if I am getting it to move--you don't want to move it very much, only a tiny bit as a small slide makes a big change.)

If there was a way to lock these settings I would lock it down so this doesn't happen again.