Barney states that he didn't pack more than one tie, but in The Best Man Barney asks for Ted's opinion for which tie to wear, holding up multiple ties for comparison.
Robin has always been classified as a die-hard Vancouver Canucks fan but while her and her sister are playing hockey in Robins room they both are wearing old time Atlanta Thrashers jerseys a team no where near Canada and Robin continues to wear it throughout the show, even though she is a Canucks fan.