wow. i think we can get you going so first off don't throw it in the dumpster yet.
since i first recieved mine i always fill the charcoal bowl full for things such as briskit, pork shoulder (butt) picnics, ham, etc. large cuts that take long periods of time over low and slow. the full bowl/and or/ring is filled with UNLIT fuel. I was lucky enough to browse this site before I was a member and note to not always follow the Weber instructions on the standard firing up method. 80% of the time im using "Minion Method" as described above, and better decribed on this site.
EXSAMPLE: i've prepared a briskit with rub etc.
I fill ring completely full, if not more (round the ring over the top a bit) I light for my elevation about 20 briq's or slightly less (equivelent) amount of lump in a chimney. when fully lit or darn close (ashed over and flaming out of top) I dump over top of the UNLIT full ring of fuel (carefully) At this point all vents are wide open, and ussually I'll even leave the fuel door off at this point of assembling the cooker. if using water i put it in. if not using water, I open a brusky and light a cig, and hang out a while and smell it.
when its nearing hotter, 200's I put the smoke wood on and fuel door, vents still wide open. if my target is 235-250 which it often is for me I close vents halfway at the 225 or so mark, and adjust accordingly from there. when smoke settles a bit, put my food on and after about 45 min. or so things settle and you should be home free. if this doesn't help im sorry. air leak cant be your issue otherwise you'de be running hot, so I can't imagine what else to tell you unless you've accedently selected all of the worst fuels possible. (i doubt) let us know. others will chime in so hang in there. good luck amigo.
I have to stress once more to hang in there cause its a great little cooker and what you produce from it will be excellent. and your not placing your water pan on top of the charcoal ring are you? ya... i didn't think so but thought i'de ask