This happens because users have rights to objects that they "own" in their personal folders. If you schedule something in the folder, you own it, not the person who owns the folder. This is one of many reasons why I usually recommend to my clients that they not let users schedule from their personal folders.
To fix this, you'll need to give the user "Full Control" rights to their personal folder instead/in addition to the "Full Control (Owner)" rights that are the default.
-Dell
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