Yuen Meng Yong Yes I can confirm that it is the bank that is the problem.
I made 2 transfers within 10 minutes of each other into Kasikornbank both under the THB 2M limit via DBS Remit. The 2nd transfer was blocked, queued and executed 24 hours later down to the minute. DBS Remit's own page only states that there is a 2M limit, but does not say how many 2M transfers you can make. So I have tested that process and can tell you that it is 2M every 24 hours. I incurred an expense of SGD 182 in airline ticket rescheduling because of this surprise and I successfuly claimed it back from DBS!
For info:
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