Wow!! Great party total to get $140 in freebies!! I can answer your questions.
Yes, you may choose the Hostess Collection 1 three times. There will be tax on your hostess rewards, but there will be no shipping charged on any of them.
You can choose a stamp pad set as a 1/2 price item, but, if you want pads for the regular hostess rewards, you will need to list the stamp pads separately. The pad set has a special price on it, where the singles are at the full price, so, that's why it's that way.
HTH
Suz
CTMH Director
http://www.suzastampin.com