On the 'echo $line' line, the shell was asked to print the value of $line. The shell says ok - done. Then the shell moves on to the next line, that basically says 'get string then pipe it to some string manipulation and print result'.

I believe 'print something on the screen' was asked from the shell twice, 1 by echo 2 by awk, which are from 2 separate lines , so the shell behaved as expected.

To prevent this you can contain the second line in $(), so that echo will print "$line + $(whatever comes out here)"

for line in $(cat ips.txt)
do
echo $line : $(whois $line | grep OrgName | awk '{print $2,$NF}')
done