In general, softshells can not be made 'waterproof' because of the stretch in the material. Waterproof membranes can not stretch like the softshell material can.
There are some jackets on the market (like the Marmot La Grave being discussed here) that claim to be a waterproof softshell, but in reality they are hardly a softshell. What's going on here is that the 'softshell' is made less stretchy than a normal softshell and then they use the Gore-Tex soft shell membrane which has a bit more stretch. The result is a jkt half way between a traditional hardshell and a softshell. To the touch, it feels like a softshell but it's thinner and less stretchy.
Regarding the question of this jacket not seeming to be waterproof, it sounds like it's working fine to me. All waterproof jackets have the waterproof membrane UNDERNEATH the face fabric, so the face fabric can get wet but the jkt is still waterproof because the water hasn't penetrated the membrane. In all waterproof jkts, the face fabric is coated with something called a DWR (durable water repellent) which helps the water bead off, but this wears off over time and you can force the water to soak in by rubbing it in. With any jkt, it's important to keep the DWR in good condition by restoring it every year or two. Even if the jkt is still waterproof, it can not breathe properly if the face fabric is saturated. Plus having the face fabric saturated adds weight :)