Bertieboo..... I think she sounds a bit daffy, to be honest. Quite unprofessional. Can I ask how old she is? If she was with her last family for 5 years, she must be at least, what, 23?
She obviously has issues with overstepping boundaries. At the end of the day she is there to HELP you take care of your daughter. Not decide how, not go behind your back and do it her way, but be the proxy version of YOU. I'm aware that I am there instead of the parent as sadly they have to go to work. It's your right to bring up your child any way you see fit and something as important as weaning is completely up to you. I'm so shocked.
I'm a nanny and as soon as the parents are back, I consider it good manners to fade back a bit, let them be the ones doing all the kissing and cuddling - that's just my instinct! I do kiss and cuddle B, because she likes it, but I tend to stick to the top of her head unless she specifically goes for a nose nuzzle. Sitting together on the sofa is fine. I would never EVER consider it appropriate to get into bed with a charge, even - especially - if they were a tiny baby. Plus it does suggest she is not timekeeping very well, as she SHOULD be ready to begin her working day up and about and... WORKING. Not sleeping, and throwing the routine off.
As far as the disciplinary procedure goes, her probation is up soon and it's the perfect time to give her a bit of warning and go through everything. It can be earlier this week, but I'd say don't spring it on her and expect her to be able to deal with all the points there and then. Perhaps you could get something like an agenda together - informally tell her tonight that tomorrow evening after work, you would like to discuss a, b, and c that you have been unhappy with. Tell her you are taking these points very seriously as you feel uncomfortable with them. Make it about the issues - the bed, the routine, the feeding - not about her personally, but how she is conducting herself AT WORK. There seems to be a whole blurred line about how relaxed things should be, and should you try over this next month's probation to reestablish things, try and get some differentiation between "work" time and "off duty" time. When she is at work, she should be expected to be up, awake, and working. Not lazing about in bed.
PS Drinking Champagne on our own time is a perk of being a nanny I'm afraid! It's not like you're subsidising us - we don't have works do's to go to with lovely canapes and a free bar! We might do all our shopping in Primark and then treat ourselves to a stupidly expensive cocktail or three........ but come on, you don't REALLY begrudge anyone that, do you? ;-)