Normal transit time from the USA to pretty well anywhere in Canada is about 20 days.
I don't understand why you would hide the actual date the parcels got to Pearson International, but if fewer than 20 days have passed since purchase, relax, they are on their way.
For the parcel that was returned to the seller, ask the seller what reason was given on the CBSA label.
Or look on the CBSA website
http://www.cbsa-asfc.gc.ca/import/postal-postale/menu-eng.html
and check in particular if the item was in a prohibited category. (One that often surprises Canadian buyers is paintball equipment. I've had trouble with a type of chimney fire suppressant that CBSA considers to be a firework.)
In any case, if more than 30 days have passed and fewer than 45, open an Item Not Received Dispute to get a refund. Although you'll probably receive the orders before the dispute is completed.