In June I have nothing to assign, in July I have assigned nothing, but it’s telling me I have overassigned £4.60 for the month. What could be the cause?

I had some categories in June that were overfunded so I set them back to expected funds.

Now it shows the June I need to assign £7.72

But when I click July it is now showing £3.12

So I still have this weird £4.60 discrepancy between them.

If I try to assign the July £3.12 and go back to June I still have £4.60 to assign. If I assign it then it takes me into the negative for July for £4.60.

Any idea for why there is a discrepancy between what I have in ready to assign for both months?