Hi 21, I assume you are using the following procedure. Can you confirm please then at least I know it's not me at fault:
1. Take severall registered exposures of an image at different focus points, exposure values [Fl/Sp] on manual and remain the same.
2. Import raw images into PS [in my case from LR] as a set of layered images
3. Select and auto align all images
4. Auto Blend Layers
Thanks in advance
LJ