Unity package doesn't show as being updateable when you have 5.4 installed
Could you try running the python version of the script?
Does it show the Unity update?
I've removed the bash version of the update checker script. It has too many bugs and bash just isn't the right language for this.
Have you updated today yet? If you haven't please run git pull and test the py script before updating. It should show some new compiz packages.