It is a known issue that if you cancel a payment - and then make a fresh one - that the cancelled payment will remain in your un-reconciled list. It should be balanced to zero - but it is not clean when auditors review.
This bug has been corrected for V.11 apparently - github query and patch info here:
https://github.com/odoo/odoo/issues/18699
https://github.com/odoo/odoo/commit/df755ef6d4b470b4083a2d0556c809e78627e4db
https://github.com/odoo/odoo/commit/7544c22de9a4cea028ff8fe63931bf68573e0821
Question: For those of us still on V.10, will there be a patch, or is there an approved way to clear these un-reconciled, cancelled, payments?