Uppercasing code

WDSC team,
        Whenever I enter text in CLLE code that is mixed or lower case
and I want to upper case the code, I choose Alt+K.  If I position the
cursor to the end of the line, then press Shift+Home to highlight the
line and then press Alt+K, the editor upper cases the code but also
appends the same upper cased line to the end of the selected line.  I
can get it to happen every time if I highlight the entire line of code
(from the start (Shift+End) or end (Shift+Home) of the line). Doing
Alt+L and then Alt+K does not cause this to happen. 

I have not been able to get this to occur in RPGLE.  I have not
attempted to recreate it any other source type. 

Thanks, Matt