Shane - there are Absence Types, Categories and Reasons. Two are QuickCodes, the other (Types) is defined via the Payroll menu. This stuff is fairly basic configuration - any functional consultant should know how to set them up.
What problems are you facing with what you are trying to do - we try to avoid repeating the configuration manuals on here - but if you find anything you can't get to work, then let us know?
It is certainly true that you will not be able to delete the Types if they have been used against an employee - that is as you would expect I am sure.
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Geoff
Expressing opinions since 1962