When there are 3 drop downs, one determines the values of the other, the selection in the last drop down is not saved when changing the rules twice in the row.
For example: I have the following statement:
in fact [field1] [field2][field3]
each of the field is presented as a drop down by using the advanced ENUM feature - 1 determines the values in 2 and the selection of 2 determines the value of 3.
After the value in field3 is selected, I can move on and make the changes in the rule. When the first change occurred, Guvnor remembers the values being selected in all 3 fields. But when another change is make, the selected value in the last field (field3) will be forgotten. Please note this is only happening to the last field. I did not go further and make the statement contain more than 3 drop downs.