Excel 2003 :: VBA Code That Sorts And Deletes Data

Below is an extensive macro that basically writes data from a user's template to a certain data sheet (in the form of rows) depending on their "service group." There have been 3 separate instances of a user saving data and instead of adding rows onto the bottom of the entire list of data, the sheet only has their data and no headers/filters. I believe it is somehow deleting all the previously written data that was on that sheet.

I should also mention that this is a shared workbook. I specifically created separate sheets for each "service group" to eliminate the possibility of users overwriting each other's data (Perviously 60+ users were saving to the same sheet and running into conflicting changes errors. Now the max users writing to one sheet is 10-12). Since it is not occurring every time, I am not sure where the error is. Could it possibly be in the sort or delete sections in bold below?

I am using Excel 2003.

Code:
Sub SaveData_Test()
'---------------------------------------------------------------------------------------
' Procedure : SaveData_Test
' Author : Julie/Cecil
' Date : Fri, 1/13/12
' Purpose : Modified Julies code to capture date entries
' associated with hours logged per category.
' Check notes attached to "sOp" string comment
' for additional details.

[Code] ..........