SMP (Statutory maternity pay)is not recalculating

Employee primitively had a commencement day of maternity arsenic 14th February 2024, it present transpired that she started connected 14th January.  Adjustments made to IT2001 and IT88 successful existent payroll.

We were expecting a minus wage from the caller opening of Mat leave, a positive OMP 100% for the aforesaid period, past astatine the extremity an overpayment of OMP.  truthful erstwhile summarized OMP astir zero (give oregon instrumentality days rounding for fixed months) and minus salary, but we person minus both.  It looks similar it is calculating the 100% OMP correctly, but lone paying a tiny amount.  is that SMP offsetting but not paying? Also /mpy is not generating successful Jan 24 .