Probably due to it's evolution, some of the dialog boxes (ok, a lot) have various controls that are not Windows compliant. For example, in the "Create/Edit Wire tpe" dialog, the grid control SHOULD sort by single clicking on a column header, like most things do. Instead, the user has to double click it. And that isn't documented anywhere that I know of.
Also, when exporting to a spreadsheet, some of the fields have information stripped due to (I suspect) non-standard text fields. Quotation marks in particular can disappear, and the underscore code (%%U) does as well. These can also get stripped when updating between related symbols. Very frustrating.
Other codes (%%D, %%C) seem to be unaffected.
(This is true of ACE2013, don't know about later versions but I bet it hasn't changed.)
