I have noticed, when duplicating a graphic by using Copy - Paste, that some of the colours in the graphic get changed: not hugely, but noticeably. E.g. I had one colour 837A81 on the original was changed to 938A91 on the copy. Not all colours get changed, and many that do change don't exhibit that arithmetical fascination. Even a single colour swatch will sometimes get changed (usually to a lighter shade) but more often not. The whole thing is inconsistent, but I haven't explored a lot of variables to see if there is one thing in particular that causes it.
Re-copying a copy doesn't seem to change it again.
Duplicating a graphic using Edit/Duplicate seems to copy all colours faithfully, but of course you cannot use it to transfer a graphic between EazyDraw documents.
Is this a known fact, or am I missing something? Is there a work-around or a method of avoiding such changes?