aiden-grau → created an issue.
Thanks for that!
Yes we are using that extension, if a line item is edited or added it does its thing and gets the totals correct, but it doesn't change the behaviour when the contribution edit form is submitted. I've used custom code in a hook_civicrm_pre implementation to check and correct the totals, but that doesn't seem like the right solution here. I think ideally the civicrm code needs to be improved, either that or perhaps modules creating multiple line item contributions need to do things differently (e.g. not use quick config)?