The Orca configuration GUI has sliders where the slider values are displayed in text to the right of the slider.  The text to the right is held in the accessible text specialization of the slider, and this text is a little screwy in that the implementors of the slider support decided to put in a Unicode left-to-right character as part of the text, even though that is not painted on the screen.  

When Orca speaks these sliders, it speaks both the value and the text, which means it tends to speak the same thing twice, along with the left-to-right unicode character.