Keeps failing emissions test

Before the first smog check I replaced the catalytic converter and tuned it up; plugs, wires, and air filter. It failed high hc 289at 15 mile per hour and 286 at 25, also my timing was way off. So I found the chain was off a few teeth got that straightened out. Replaced injectors, number three was clogged, changed knock sensor and temperature sensor and TP sensor. No codes were coming up. Took it back in and it failed worse than before and this time my no went up from 32 at 15 mph and 36 at 25 mph to 386 at 15 and 485 at 25. So I went and checked out my vacuum lines and found one that was off. Also check my EGR and it was clear and functioning took it back and failed, but this time I failed my no461 and 655 the last time I had problems and went through the same stuff but I then replaced the catalytic converter and passed with 0 emissions. I'm wondering if I got ripped off for this catalytic converter I bought. It doesn't seem to be doing anything and each time I fix something my tests get worse. Also it has got a new head on it that's less than 2 years old and the compression is good. Any thought would be greatly appreciated. I have spent almost $800.00 and i'm in worst shape than when I started.