Tenancy Agreement Stamping Update

Yesterday I went to stamp the new agreement made with my last tenant of the SD Tiara apartment.  I took the opportunity to ask the officer what I should do about the last agreement that was breached by the last tenant.

She said that a cancellation is not possible as the LHDN will not refund the stamp duty paid.  Even if a new tenant moves in to replace the old tenant at the same terms and period of rental, a new agreement still has to be made between the landlord and the new tenant.
So it confirms my earlier search for answer that there is no need to cancel the stamping, the only thing would be to declare the rental income as it is by 2 separate tenants at separate period.
One more thing, there is a little white piece of paper that is stuck at the desk of the officer which she refers to for the stamp duty amount.  Let's say the monthly rental is RM300, the stamping fee would be RM5 for original and RM5 for the copy.  Do double-check with the officer. Because in this case, she miscalculated the fees, but I pointed it out to her because I had the experience of stamping the similar agreement before.  Otherwise I would have paid a total of RM30 instead of RM10 because of the error.