It would seem you're making some errors in your math as well. No matter what level skill chain you open, you will only get 1 (one) WS point for being the opener. Opening a skill chain is no different than soloing a weapon skill. The only case you would get 3 points for opening a level 3 skill chain is if your opening weapon skill closed a level 2 skill chain first.
To reiterate because it seems it can't be said enough:
Solo weapon skill / open skill chain: 1 point
Close level 1 skill chain: 2 points
Close level 2 skill chain: 3 points
Close level 3 skill chain: 5 points
If a weapon skill qualifies as both an opener and a closer, closer points are only awarded.