Hi! Thank you for taking the time to write a review :-)

The feature you mention is already present, though I'm working on a re-design that will make it more visible, as it seems to be a common problem that people are not able to find it. If you click on "Need to replace something other than Y/N?" you'll be able to do (and optionally, store) other replacements. There's no limit on the number (just remember to check the box to store the replacement).

And if you click on "Stored Replacements", you'll be able to see the list of everything that changes.