This problem only applies to CuteHTML LE packaged with CuteFTP versions 4.x and 5.x. In some cases, each time the Enter key is pressed, the cursor advances two rows instead of one as in the following example.
Workaround
Upgrade to a more recent version of the software such as CuteHTML 2, CuteHTML Pro or the free built-in HTML editor included with CuteFTP 6 Home or Professional.