Apologies for not coming back earlier.

I took your advise and used a different browser (went from Brave to MS Edge) and was able to achieve and finalise what I originally had a dilemma with. I managed to delete earlier pay runs, set up the correct pay scale parameters and redo pay runs for the desired months. Now I'm up to date and everything financially checks out to the penny against calculations done separately. Thank you so much for your earlier advice.