Can't debug "find" function in UserForm

Ok, I fess up... I tried to modify a UserForm that does a bunch of cool stuff I could never write myself... As a consequence, a lot is not working so I need some help! Attached is the example document, and so far I have spotted the following glitches:

"Find" function
- message is not always correct (ie: says there are "24 instances of x" when it's only 2)
- when data is found, the form textboxes and comboboxes are not populated correctly
- the Listbox throws back more data than just what is relevant

"Amend" function
Just likes to bug - don't know why!

Selecting item from listbox
Doesn't seem to work at all

Hmmm...