Hi Old-Bank,
Thanks for reaching out.
This would be due to the way you've set up your pay items. If you open Payroll > Pay Items > click the pay item in question > unselect the option Automatically adjust base hourly or base salary details if you'd like the base hourly or base salary hours and amounts to no longer be adjusted for amounts paid using this wage pay item.
More information on this can be found via the help article below:
Do let me know if you had any further queries.
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