I'd first try to figure out where the water is coming in. I've had problems with everything below:
1. Do you first feel wet around wrists or elbows -> wrist gaskets most likely, but could be dry top fabric. Put dry top over your head and look for light leaks, most likely at elbows. Hold wrists closed and fill sleeves with water and look for leads/seepage. Put a _little_ pressure on water (squeeze) and looks for leaks. I just sent back a dry top for repair/replacement that has what I consider extreme leakage in the fabric and seams - this top was only 3 yrs old and wetter than my > 10-yr old Stohlquist. For small holes/tears in dry tops, I've had really good luck with iron-on gore-tex repair patching fabric (get at REI or any good outdoor store) and aquaseal.
2. Waist wet (usually pile top feels soaked around waist/under skirt, but chest / sleeves dry) -> loose skirt/bad tunnel.
3. Drips on legs - probably pinholes in skirt. Hold up to sky and _stretch_ this and look for pinholes, usually over rim, where the skirt's been folded (e.g., stored crunched up), around base of tunnel. Fix with aquaseal. These can be very hard to see and insidious.
4. Around rim of sprayskirt. You'll probably feel on your legs first, but the boat will likely only lead (at least badly) when you surf or run vigorous rapids (i.e., may not leak when running easy white water).
5. Around bolt hole, cracks, etc - holes in boat. Water "appears" in boat. You can try partially filling the boat with water and looking for leaks, but just tightening all the bolts will usually fix this enough to be ignored. If you find a bad leak, it's probably easiest to loosen the bolt and put a ring of plumber's putty or silicone sealant around it and re-tighten. Wave Sport seems to have particularly poor quality control in boat assembly -- new boats show up with really loose bolts, and they constantly loosen while on the car or on the river. You could have an unidentified crack - look esp around the cockpit rim and this would explain it.
6. Finally, DWR treatment wasted. This only lasts a short time (less than a season) and once your fabric is saturated, you can't force vapor through it. So if you're playing and constantly re-wetting the fabric, and sweating much, it's like wearing a plastic bag. You can re-proof tops and it really helps for a while, but it's kind of a pain to do it.
Seems like I always have leaks and am wet while boating. I'm jealous or Miah and others that somehow manage to stay dry!!