Run time eval with log for a Sunday where you say the problem is.
Expand fully the log by double clicking the day.
Find all occurrences of the time w/t. Then you would know how the time w/t is getting generated.
If it is not generated in time eval, then it is impossible for the w/t to be brought into IT with function ZLIT when you run payroll.
Check in payroll schema->sub-schema XT00 function DAYPR. See if it is the same schema as your time eval schema. If not, then this schema may be generating the time w/t.