Why wtpart getting checked into windchill personal cabinet at site level, need help with reason

[SA_12455883]

Why sometimes wtpart getting checked into windchill personal cabinet at site level, need help with reason and how can it be avoided.

[Fadel]

This is expected : 

• Personal Cabinet is the logical place where all the checked out and modified objects of users are kept
• Every user has his own Personal Cabinet associated to him to keep working copy private to users
• The objects in these Personal Cabinets are only visible to those users to whom that Personal Cabinet belongs
• To check the personal cabinet of a deleted user navigate to Site > Utilities > Personal Cabinet Administration as a site administrator