F**k.
It's just you thank goodness. At some point, I've probably overtyped a formula on your sheet which I've taken a short cut in rectifying by copying the equivalent from Lyndhurst's sheet. That's brought over a fixed reference to Lyndhurst's sheet when that's not what I intended.
So it should say
=IF(L7=J7,AND(M7=K7)) to give a True or False output, referring to your scores
but what it actually says is
=IF(Lyndy!L7=J7,AND(Lyndy!M7=K7)) giving a True or False output, referring to Lyndhurst's scores
I will rectify - it's easy, just a delete in the relevant range, but I will then have to rework the brought forward totals into this new round. Not tonight in other words. My apologies: more haste less speed.