This confusing info seems to be a common thread with the NHS. Mrs V waited months for her aunt to be discharged this month despite being advised by"medics" it will be soon, we are looking at Monday etc.
My take on it is that the decision makers meet once or possibly maybe twice a week to discuss the progress of a patient. They can't do it, in these sort of cases, more rapidly as the monitoring needs days rather than hours to see that the patients vitals are OK. At these weekly meetings (Wednesdays?) the whole situation is assessed e.g. if patient is fine for being discharged is the home environment they are going to suitable? Are they as strong as they were before? Can they do daily tasks as well as they did before? If carers are needed have they got available carers?
My advice, apart from being patient, would be to try and deal with one person in the ward. I have forgotten the title but modern equivalent of matron. That will be a two way thing. You can ask about things like if she can no longer negotiate steps should you get some hand rails put in (as an example) and if so how does that work - they might suggest approaching Red Cross for example. There are lots of helpful organisations out there.
The patience thing is perhaps the hardest bit but remember that the hospitals need the beds and are targetted on getting people home after an event.
It is good that you are keeping being positive.