It's possible you're off, the DOHCs are a little tricky, because the intake (drivers side) cam wants to turn on you. What I always do is get all the marks (including the belt) lined up and then turn it over with a wrench a full 360 at least twice, and check that all four cams and crank marks keep lining up with the lines on the covers and each other again (the lines on the belt won't line up after the first turn) before I start the engine.
With what you're describing, I'd take the covers etc. back off, and check the marks by turning to TDC again. If it's off you'll just have to reinstall the T belt.