For Word 97 and above

I have a variable field, tha is a field linked to the comtent of a
document variable.
The variable contains carriage returns and the field is displayed
correctly on multiple lines:

Line1
Line2
Line3

If I apply a numbering formatting to the field, it is displayed
correctly:

1) Line1
2) Line2
3) Line3

But if I do a field update I lose the numbering style, and here's what
i get:

1) Line1
Line2
Line3
Line4

If I do a CTRL-Z it goes back to how it should be

1) Line1
2) Line2
3) Line3
4) Line4

Any hint?

Thanks