Welcome to the Community, @Rebecca-Heath!
Let's review your Profit and Loss report and get it corrected.
In your Profit and Loss report, let's drill down the two categories by clicking on each of their amounts. Then, please review if the transactions are created twice and/or one of the categories itself.
If in any case, here are the articles you can check if you need to delete some transactions or of the categories itself.
However, I recommend seeking help from your accountant first before making any changes.
Please feel free to leave a comment below if you have any other questions.