This is what - the
FOURTH time you've posted this same post?!?!? -_- I previously
wrote over here giving a possible reason as to why Imperial haven't given you your interview results yet.
Honestly, please be patient. Getting edgy about not hearing back from them is not going to speed up the process.
Chem Eng is one of their most popular courses; so there are plenty other app folders that need sorting out/work on (you're not the only one!) Updating UCAS, sending out results letters/emails - these take time.
It's possible that some people from your batch may already have had UCAS updated; but the holidays came before they could get round to updating yours + other students'. UK postal service got delayed round about their holiday time, too - because of the snow!
Also, it just so happens that Spring term didn't start until yesterday (8th Jan), so there probably wasn't anyone in the admissions office over the holidays (they were off from the 17th of December, give or take.)
So take a breath, step away from the computer, and go clear your mind. Do something else that will take your mind off the waiting. It's not fun, I know; but it needs to be done. You're not the only one waiting, there are plenty others as well.
If they still haven't gotten back to you by the end of January, THEN I would fire off a polite, CALM email to find out what's going on. But until then, there's nothing to be "confused" about - so don't get your knickers in a twist.