Hi Jian Su,
If you are using the RF environment for confirming the Warehouse Task, then the Warehouse Task are Splits into 2 Items.
The First Warehouse Task is from Source Bin to Resource with whom you logged into RF Environment.
The Second Warehouse Task is from Resource to Dest. Bin the finally WT confirmation.
For Example:
WT1 Item1 Source Bin ----> to ----> Resource1
WT1 Item2 Resource1 ----> to -----> Dest Bin.
Regards
Ramesh