Question: 

User had made a few changes to the BOM through the Bill of Material Module and then went into the Kit module and depressed the update kit button.  A large number of items appear to be dispositioned and issued to the kit for items that had no qty changes, etc. . .

Answer: 

One of the possible reasons could be the fact that the user went through and changed the assigned workcenter on the BOM.  So when the update kit checks the existing kit to the new BOM changes it sees all of the Workcenter changes and bring them in for disposition.  If the kit was pulled while the BOM Workcenter was STAG  then the user edits the WC on the BOM to Final Inspection, when the update kit button is depressed that item will be pulled into the screen for disposition.