Asset Bundles misMatch

Good Afternoon. This is the thing : I have compiled an AssetBundle based on 100 Images, the Bundle Is already Stored on the server. All those images must be shown like this :

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I have a Slider, and That slider moves a Quad towards front or Backwards. via script, i assign to each +1 on Z axis (from 1 to 100 for example ) one of those 100 Images , from A to Z. ( // Z Axis = 1 so the A letter on Plane // Z Axis = 2 so the B Letter is on plane .) everything is ok on Android and Stand Alone ( witout using Asset Bundles ) , But , in Web_Gl i got this behaviour :

All those Images gets upside down, so they get rendered into a inverse order It mean Z Axis = 1 the Z letter is rendered on Quad, Z Axis = 2 the Y letter is rendered on Quad. ... :/ Does Any one of you have an idea ... why is this happening ? and what can i do to solve it ?

Thank you !!