There are two attributes in the sheet's HTML named attr_Appearance. One is the textarea you are trying to fill out. The other is a hidden checkbox with a numeric value (0 to 9). A sheetworker is setting the value of attr_Appearance to a numeric value based on other attributes on the sheet. The default value looks to turn out to be 1, so that's what you see in the Appearance textarea when you re-open the sheet. You may want to reach out to the sheet's author ( Coal Powered Puppet ) to see if he can fix it.