.extractRegion is for sprites that were extracted from something else. If you want to grab the min and max extents and rotated states and use them in whatever way you want - look at tk2dSpriteGeomGen.SetClippedSpriteGeom, that works out the geometry and UVs for the different supported permutations. In addition to the sprite being rotated it could also be trimmed, i.e. the UVs will be smaller than the source UV rect.