Hi John,
As the FAQ for AnythingSlider states, the issue is from the plugin using scrollLeft. The problem is that you cannot set a scrollLeft position when the slider is hidden; try as you might to set it, as soon as the slider comes into view, the scrollLeft position will be set to zero.
So, 1) don’t hide the slider, 2) set the slide after the slider becomes visible (this requires a callback from whatever plugin or code that is hiding the slider – tab, accordion, etc), or 3) try using AnythingSlider to do the fade effect (described above)