Hi all, I'm trying to report on credit memos but for some reason the tax after discount is pulling out really random numbers and I can't tell where these values are coming from. Any ideas?

The report at the moment:

From a customization view: I don't know what summary type I should be using on tax but I've tried all of them and can't get the correct or even different values to show.

My filters: I was also getting duplicates of the credits before in the Amount (Net) ones which were positive and mirrored ones that were negative. I wasn't sure if there was a better way to ignore these or why they were showing up at all so I set a filter that the amount (net) should be greater than 0.