Try using purgechar(field, chr(10)) or with chr(13) with your load statement on the field you have problem with. You may also use "replace" and replace it with a space.
Sometime it is possibe to enter an "enter" in sap fields. I am very sure it's not omiting the contents but just putting in two lines. Try testing by putting field in a text box and make that text box little wider and higher than 2-3 lines.