As the others have said, the parameter that you are removing limits from is a pose Controller (CTRL). It’s not the actual morph.
To do what you want you need to remove the limits of both the controller and the morph.
Most controlled morphs are hidden by default and you will need to click on the Menu (the little triangle with the lines) on the Parameters pane and check Show Hidden.
Next you need to locate the actual morph, see the first image below, click on the gear cog for ‘Lips Part Center’ and select Parameter Settings.
In the below image, circled at the top, you will see the internal property name (CTRLLipsPartCenter), in the lower box you will see where the morph is located (Genesis:Lips Part Center)
This means it can be found on the Genesis root node.
I’ve shown the Property Editor and Highlighted the morph. In the Hierarchy panel you can see that CTRLLipsPartCenter is the controller for PHMLipsPartCenter and in the Grouping/Settings panel PHMLipsPartCenter is located in the Lips group under Pose Controls.
In the second image I circled the hidden Lips Part Center morph in the Parameters tab. You can see that it is located on the Genesis root under the Pose Controls group just like the pose control on the head.
Click the gear cog and select Parameter Settings and you can see where I’ve circled the Controller showing the Lips Part Center controller located on the Head.
Un-check Use Limits and Accept.
Now select the head and when you adjust the Lips Part Center slider the morph should move past the limits.
If the controller listed more than one morph like in the image jestmart showed, you would need to do this for each morph listed.
Now here’s the bad news, once you close studio or create a new scene all of these limits will revert back to being on, even if you save the scene.
The reason, the limits are set in the Genesis .duf and morph .dsf files. So when ever studio reads those files it sets the limits. The only way around that is to re-save all of the Genesis files, and I WOULD NOT recommend doing that unless you know what your doing.
Well I hope this helps…
Click thumbnail to see full-size image