As alluded to in my assumption, you can't have two instances of the same macro names in the same module. Try replacing the code you have with this single macro which merges the intent of both macros with a bit more flexibility. Note that there is a difference between the Tag and Title properties on a Content Control. Either can be used in the code.
Code:
Private Sub Document_ContentControlOnExit(ByVal aCC As ContentControl, Cancel As Boolean)
If aCC.ShowingPlaceholderText Then
Select Case aCC.Tag
Case "Rev. #", "PDR #", "Date of Discovery", "Type" 'these CCs require an answer
MsgBox "This Content Control requires a response.", vbInformation + vbOKOnly, "INPUT REQUIRED"
Cancel = True
End Select
Else 'if CC has content, check its type matches the content
If aCC.Tag Like "*[#]" Then 'if the CCs tag ends with '#'
If Not IsNumeric(aCC.Range.Text) Then
MsgBox "This field requires a numeric response.", vbInformation + vbOKOnly, "INPUT REQUIRED"
Cancel = True
End If
ElseIf aCC.Tag Like "*Date*" Then 'if CCs tag includes 'Date'
If Not IsDate(aCC.Range.Text) Then
MsgBox "This field requires a date response.", vbInformation + vbOKOnly, "INPUT REQUIRED"
Cancel = True
End If
End If
End If
End Sub