Currently Being ModeratedNov 21, 2012 10:30 AM (in response to WhatPixelYouOn)
Assuming your groups are 2D groups then importing an object /image always comes in as the top layer in the group or selected group if you have more than one. That means it displays above other layers below it. What you are seeing is normal behavior. Works this way when you use the apply button. If you drag and drop from library you can place it where you want in the layer list. No preference settings for this.
Currently Being ModeratedNov 23, 2012 2:44 AM (in response to WhatPixelYouOn)
Did you add a filter that rasterizes the layer (or another layer within the same 3D group)? (Blurs, Glows, Distortions, etc.) A lot of different filters will cause 3D groups to "flatten" (a.k.a. rasterize).