Bro you've answered yourself. Because the interest that was supposed to be forfeit(due to early withdrawal) was monthly credited to your saving account. If you add back all the past monthly interest together with your current withdrawn deducted principal they will be equal to your original principal.

In a simple way, you are not getting any interest due to early withdrawal.

likely because maybank paid u in full monthly but u did early withdrawal. so they deduct back the extra money given to you.

Premature withdrawal prior to maturity of tenure is subject to the following  conditions: For withdrawals within 3 months of the investment tenure, the customers shall agree to waive the right to receive all of the attributed profit; For withdrawals after 3 months of the investment tenure and before the maturity date, the customers shall agree to waive the right to receive 50% of the attributed profit.

the page keeps auto-collapsing the "find out more" drop-down after clicking 
https://www.alliancebank.com.my/Alliance/me...gn-week3-tc.pdf

Correct me if I am wrong.

This is what I understand.

10K in FD for 9 months at 6.18 roughly will get  rm463.5
10K in variable fund ASNB (ASN, ASN2, ASN3 imbang, ASG)
5% sales charge rm500

from the looks of it you already -rm36.5 if the ASNB fund did not perform.