There might be a different environment on her machine
(different browser security settings, different anti-virus
settings, etc.).
She might be doing an inordinate amount of file renaming,
copying/pasting, etc.
She might be a user who tries doing multiple things at once,
or works in RH too quickly (closing files immediately without
saving first, etc).
These types of scenarios would mean that she would continue
the CPD-bloat she is experiencing. However, as long as this method
works, don't concern yourself any further.
Good luck,
Leon