With regards to the "split transaction" in PB cashback 4 more campaign, a PB customer service officer notified me that:

"In the event if you have 2 or more transactions in the same day from the same merchant, you are still eligible to take part in the campaign. Kindly ensure that these transactions are not done in a short time frame (very near to one another). "

Any idea if 5 minutes is a safe time interval in order for the system not deemed as "SPLIT TRANSACTION" ??