Originally posted by Zappy:

Immediately above the shape key amount value, there are 3 buttons near the right. The left-most of those (to the right of the "Relative" tick-box) should have a tool-tip saying "Always show the current Shape for this Object". Disable that option.

Dude. Thank you so much!

So, I'm using a DMX in Blender. I apply a shape key, but as soon as I click on another shape key, the applied shape key is not applied, even though the value is 1.

Originally posted by Dr. Shenanigans:

well, my problem is solved!

despite these errors, all I wanted was to preserve the imported model's shape keys. it turns out, everything was fine, and "Always show the current shape for this object" was turned on during the import.

turning it off did what I wanted, and that was to make the shape keys workable.
it always ends up being stupid and simple for me, thanks for putting up with it!

Hey! I know this is old, but where can I find this "Always show the current shape for this object" option? I have this exact same issue and it's driving me insane!