Hey!

For the opening and closing ranks mentioned in official website , opening ranks mean the minimum rank and closing rank means the maximum rank upto which the college will accept admission or they are minimum and maximum admissible ranks for any college.

And as far as your case is considered , then you must know that cutoffs fluctuate every year. So what you might have seen would be previoys year cutiffs and as  the cutoffs would have changed this year. And as per the increased cutoffs , you might not have chances for getting admission in IET lucknow.

Hope it helps!