Make sure that the master.cf lines are correct. Extraneous white space _shouldn't_ make a difference, but you might have picked up an extra line break or something during your copy and paste. Double check the text in that file, making sure it's on two lines.

Also, make sure that in main.cf you have uncommented the mailbox_transport to cyrus. Finally, try completely stopping mail services (sudo postfix stop) and then starting them back up (sudo postfix start). For some reason your Postfix daemons might not be picking up on the changes. A complete stop/start will hopefully help.