How did you declared those?
As the picture shows, DefaultTime is divided into two, how to solve this problem?
After trying, I found out why: When your CategoryName consists of multiple words, your naming does not write spaces between words.
At this time, the constituent words of the Category displayed on the left side of the Variables contain spaces.
The point is here, when you drag other variables into the category, its CategoryName contains spaces.
I don’t quite understand which aspect you are asking? Does it mean finding this problem? Or something else?