Ron,

Are you INSERTING new rows before typing or cutting/pasting and then
deleting the data from other old rows?

I had similar problems to this on one occassion - I'm still not sure
what causes it but I have a feeling that some non printing characters
may be left lying around; perhaps someone can enlighten us - but I did
control the file size issue by deleting the old rows rather than just
deleting the data they contain.

Regards,

Alan