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come on!!
sed -n 's/ .*=[^>]*//p;d'

What would be the expected output?

One of the things that imagine could be is:
usa_newjercy_042008.dat 042008
usa_newjercy_012009.dat 012009
usa_ohao_042008.dat 042008

Yeap, as pointed before, spawn'd processed (child) will inherit parent env vars if its attached to current context with ".".

Little example
test1.sh=>
test=test44
echo $test
./test2.sh &
....

You tried this?
sed -n 's/ style=[^>]*//p;d'

I guess that you need to first separate stdout from stderr when you call the script
./script.sh > stdout.log 2>stderr.log

Also, I'd redirect to /dev/null the ouput from calls like:
pr_cnt=`ps...

No need for script, try this in a test dir:
find . -name "*.sh" | xargs -I{} mv {} {}.bak

awk '!/^$/ {print $0}' test.txt