I see that! Most company's send tracking with the shipping notice. Last time I ordered from them, I didn't even get a shipping confirmation. It appears they've changed policy a bit since then. They do make a quality product and shipping is usually quick. From they're web site:
Can I get a USPS Tracking Number?Yes, upon request. Please wait 4 days after receiving your automated shipping confirmation email before requesting the tracking number. Why? Because you will already have your shipment by then and we won't have to spend time excavating it from our postage vendor's database. This takes time away from our shipping operation and slows the process. Because we pride ourselves on fast, responsive shipping, we want to maintain it. Automatically receive tracking details by visiting https://my.usps.com
Ya can't check with the postal service if ya don't have the number! Unless you are signed up for delivery notification.