First thing is to ensure that there are no macros running which might be causing changes you don't anticipate. Next, you need to ensure that you can see all the 'bounding boxes' of your CCs so you have a chance to see what might be in scope.

Then you need to look at what type each CC is and whether they are linked to the exact same xml element and you haven't duplicated the embedded xml file.

Although you said you don't do VBA stuff, it really is the key to gaining control of what you have in your file. It is hard to audit how your CCs are behaving without using VBA to tell you how their type and xml mapping.

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Andrew Lockton
Chrysalis Design, Melbourne Australia