I have a problem with an unexplained change of Microsoft Word styles
after a copy of one portion of a document into another document.

The Word document Lesson 4, maintained by person A, uses only
"SeniorNet" styles. A Word Find for Style Normal finds no hits.

Lesson 4 is copied to Lesson 4B, which is modified by person B. A
subsequent Word Find for Style Normal finds no hits.

Lesson 4 is modified by person A. A subsequent Word Find for Style
Normal finds no hits.

The modified portion of Lesson 4B is copied and pasted (with no special
options) into Lesson 4. Some -- but not all -- of the styles of the
copied/pasted portion are changed from the appropriate "SeniorNet"
styles to Normal. A subsequent Word Find for Style Normal finds the
changed styles.

Starting with copies of backups taken just before the copy/paste from
Lesson 4B to Lesson 4, the scenario has been reproduced using both
Office XP running under Windows 98SE, and Office 2003 running under
Windows XP.

Why does this happen? What can be done to prevent it?

frankc