I have the same problem calculating OT for my staff.
They are entitle to 1 day off each week (either Saturday or Sunday) based on roster.
But the labour day falls on 01/05/2011 (Sunday) and some staff are on off day if based on roster.
Now they are making noise saying that because they came to work on 01/05/2011, they should be paid PH OT rate (2.5)
If they worked on 02/05/2011, I am supposed to pay them rest day OT rate (2.0) for REPLACING their off day on 01/05/2011 on the next day.
Correct me if I am wrong but since I have paid them PH rate for working on 01/05/2011, am I supposed to be paying them the rest day rate should they came to work on 02/05/2011?