Whoa! My prayer was answered! Problem is solved!
Helpful shell scripting guru, from a forum I'm in, was able to address my dilemma for the duplicate entries. I created a confusion which unknowingly had a BIG impact in it's evaluation of regex. Without much-ado, here it is:
sed '/'"$JOBNAME"'/{x;/Y/!{s/^/Y/;h;d;};x;}' JOBLIST.txt
Perfect! I'm just waiting for the explanation. I'm lazy right now to search for these.
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