Please help!

[Squiggleness]

My kitten is around 9/10 months old and is perfect in every way except her behaviour in the evenings. She turns into a complete pain, meowing at open doors upstairs (we have children so can't ignore this), scratching the sofas which she doesn't do during the day. Steps I've taken so far:
Playing with her prior to the evening to ensure that she is tired (didn't work and actually sometimes makes it worse)
Putting her away each time she meows
Plug in feliway
Nothing is working and seems she has got into a routine/habit. Please could someone help as it is starting to make me feel quite stressed.
Many thanks in advance

I did read your full post, and did not waste time posting to feel superior thankyou very much . Nor do my cats stay in a cattery. However, playing with your cat to tire it out before it is active is probably pointless, she needs the activity at her active time. If she is people orientated then she probably won't settle well alone either, you risk ending up with further behavioural issues due to her frustration, no matter how many "luxuries" you provide.

The simple fact is that a pet cannot wake the whole house and anyone who disagrees with that is insane

I shut mine in one room at night and they're fine. You have to ignore the meowing: It took about a week for mine to learn but now they just settle and sleep. Their sleep schedules can be trained.

Any attention is a reward so you must completely ignore any meowing 100%. Be consistent or won't take long.

OP is in no way neglectful to her animal and its ridiculous to suggest so. I agree with the poster saying move feeding time to later and sometimes playing later at night can be counterproductive so try to make that a bit earlier. You could try putting a blanket down that smells like the kittens favorite person too.

*it won't take long.

Is she a vocal breed or a moggy? At 10 months, she's now pretty much a teenager, so she'll be very active and loud. Meowing from cats is normally reserved for their for humans. She might be feeling a bit lonely, hence the meowing at closed doors, or even a bit hungry at that time of day? Do you think she's a people orientated cat & needs to be with you most of the time? Try to ignore her meowing, and it should stop. Could you put a gate at the bottom of the stairs?

Have a look at Jackson Galaxy's videos, if you haven't already. Good luck.