I know you mentioned that you followed the tutorials but I think it would help for you to review the steps you have taken to get the multiple update in place. The 'no records' error you are getting indicates that whatever reference you are using for the records is either not valid or not being set correctly.
As for the two loops this could be caused by having both a repeat region and repeat selection server behavior applied. Please post back with some more details about the steps you are taking and when you are getting this error.