Tagging: When I create a new appointment in my TimeCard calendar it is already tagged with values. Why, and what happens if I change them?
This is not an error but a setting. In the Global Settings, the TimeCardadministrator can define that certain values should be applied to appointments where no tag values are selected. There is also a setting that shows these default values to the users. In your case, the administrator has enabled both those settings.
If the default tag values are not the ones you need, you can just change them. The values you select instead will be reported. The default values will only be reported when users do not change them.