Nothing is more confusing than Lucknow in this case. LKO belongs to NR while LJN belongs to NER. Both are massive stations lying exactly next to each other. LKO's official name is "Lucknow" while LJN's official name is "Lucknow Jn". To complicate the problem furthur, since LKO has multiple routes diverging from it, it also technically it a junction thus creating a conundrum where two big separate stations belonging to separate zones can be referred to by the same name. No wonder, many folks end up at the wrong station every day.
Locals...
more... refer to LKO as Charbagh due to the way it's planned and it's building structure[and the greenery that is in front of it] and/or "Badi Line" referring to Broad Gauge. LJN is referred to as "choti line" because it was the MG terminal once[long back, now no MG lines exist anywhere in Lucknow].