Don't quite understand why DBS system has different functions even selecting same options....

For my case, I log in via iBanking then I switch to DBSV by clicking on the trading account #. Upon further scrutiny, I found that when I select "Inter Acc Trsf" option, it is not auto tagged from "Cash Account" to "Cash Upfront Acc" (though it appeared to be at first). There are actually three options i.e. "Cash Account", "Cash Upfront Account" and "Security Deposit" on both "From" and "To".

Ram shared that he only have two options instead of the three options that I had.