issue with awk and variables from previous line - bash

Question

Code typically speaks better than thousand bytes. So did this demo code that does not obey my logic. Typically I trust compilers and programs, so I think I have a typo or something somewhere.
Please, could you point it out to me?
copy & paste code below into mydemo.sh file, and run it using command sh ./mydemo.sh
in my ref system this prints out:
mytux:~# ./mydemo.sh
This should spit out:
{USER1NAME} {Firstname Surname} {user1name}
{USER2NAME} {Secondname Surname} {user2name}
{USER3NAME} {Thirdname Surname} {user3name}
---- but it spits out:
{USER1NAME} {somestring: user1name}, {user1name}
{USER2NAME} {somestring: user2name}, {user2name}
{USER3NAME} {somestring: user3name}, {user3name}
----
Why so and how to fix it?
and here's the code:
#!/bin/sh
echo "# Firstname Surname, Company">usernames.txt
echo "somestring: user1name">>usernames.txt
echo "# Secondname Surname, Company">>usernames.txt
echo "somestring: user2name">>usernames.txt
echo "# Thirdname Surname, Company">>usernames.txt
echo "somestring: user3name">>usernames.txt
echo "This should spit out:"
echo "{USER1NAME} {Firstname Surname}, {user1name}"
echo "{USER2NAME} {Secondname Surname}, {user2name}"
echo "{USER3NAME} {Thirdname Surname}, {user3name}"
echo "---- but it spits out:"
echo "{USER1NAME} {somestring: user1name}, {user1name}"
echo "{USER2NAME} {somestring: user2name}, {user2name}"
echo "{USER3NAME} {somestring: user3name}, {user3name}"
echo "---- See:"
cat usernames.txt|awk \
'BEGIN { $mylink="";} \
{ \
if(match($0,"^#")!=0) \
{ \
split($0, a, ","); \
$mylink=$a[1]; \
} \
else \
{ \
if(length($mylink)>0) \
{ \
print "{" toupper($2) "} {" $mylink "}, {" $2 "}"; \
} \
$mylink=""; \
} \
}'
echo "----"
echo "Why so and how to fix it?"

Answer 1

Is this what you're trying to achieve? It would be easier to post the input text as is.
$ awk -F"[, ]" -v OFS="}, {" '
/^#/{n=$2" "$3;next}
{print "{" toupper($2), n, $2"}"}
' usernames.txt
{USER1NAME}, {Firstname Surname}, {user1name}
{USER2NAME}, {Secondname Surname}, {user2name}
{USER3NAME}, {Thirdname Surname}, {user3name}