With all respect, the shipping calculator is not going to work unless you put in the correct weight and dimensions for the item and dimensions that fit into the min/max dimensions that each shipping service allows. The minimum dimensions for each service are:
Standard/Expedited Parcel within Canada - 10cm x 7cm x 1 mm 4"x2.8"
Expedited USA - 21 x 14 x 0.5 CM. 8.25x5.5"
Xpresspost USA - 21 x14 x 1 cm 8.25x5.5"
Small packet air U.S. & International - 14cm x 9cm x 1mm 5.5x3.5"
Tracked Packet USA & International - 14cm x 9cm x 1mm 5.5x3.5"
The calculator is working for shipping within Canada because those dimensions are over the minimum but you could send your less expensive items that are less than 2cm with lettermail within Canada, light packet USA and light packet international. You can use the calculator if you want for the last two although a flat rate works because light packet USA is the same price all over the U.S. for each weight group and the same is true for the countries that use light packet international.
Right now your Vogue pattern has $15.85 shipping to Alberta. If you used lettermail to send it, chances are that you would sell it much quicker but that is up to you of course. Stating in the listing for buyers to contact you for shipping prices doesn't work well because many buyers who see the $15 shipping in search on a $4 item won't bother to open the listing. Also, on some sites and for some categories, ebay requires that a buyer has to pay at the same time as the purchase so they can't make the purchase if there is no shipping price listed.