I'm a preloader (part time). We were told today that due to a forecasted volume spike on Monday, we will be working 8 hours instead of 5. However, we will be receiving straight time for the extra 3 hours because they are calling it a "split shift". Not sure what they mean by this. Are they considering the first 3 hours to be Sunday's shift and the remainder to be Monday's? Not sure how they could justify that given our start time is 1AM Monday morning. Is this within the contract, or do I need to grieve it?