Hey Dinesh,
I'm having 2 sprite collections that aren't responding to the "current platform". I set the current platform in a blank scene before the game loads, and this works for all the other sprites I have. I notice that the sprite collections are defaulting to whatever the tk2d preference menu is set at. Ie if it's set to 1x at editor, and my loading scene changes the platform to "2x" that sprite collection stays at "1x". I've tried rebuilding the 2 sprite collections multiple times, and they change platform fine when I manually set the preference menu.
These two sprite collections are in different folders than the other collections, but nothing else should be different. Any ideas?