Why are there landlords with negative balances showing in my landlord payments section?

You may find when using the landlord payment area that you have some landlords who show as having a negative balance. They will appear as a red row. 

Any landlord who has "Property Received Funds" will be shown on the Landlord Payments (Paying Landlords) screen whether they have outstanding transactions or not.  The red row indicates that there are outstanding invoices which are greater than the funds that have been received. If a landlord has had outstanding transactions which are less than the funds received, the landlord will be indicated lower on the page in blue.

You still have the option to pay a landlord who is marked in red, as you would just select the funds which you would like to pay under the landlord and not select any of the outstanding invoices.