I started a job over 3 months ago and am having an appraisal next week.
From the start I had a main line manager and another general manager to report to. This manager showed me the ropes at the beginning, then our dealings eased off.
Today I asked a question about how to access the back end of a website because the link on the team spreadsheet was missing. She said I should know this automatically because I have done it for other businesses. In the end I accessed it no problem and completed the task.
Later that day she said she wanted 'a word' with me & took me into a room. She mentioned my not knowing what the backend link was earlier and said she was very surprised as I deal with back end sites for customers every day and also as I said I had the skillset in my interview 

Meanwhile I feel I am getting on well with my actual manager and the director to the point I have been invited on a trip in place of my manager. The manager also offered to help me move into my new place recently.
I now feel nervous as I know customers have been giving good feedback on my performance and I worry she is out to undermine me in some way.
Another time myself and her were the only ones to dress up fancy for an event. When she said 'oh no one made an effort except me' others pointed out I had as well. She said 'oh yes' and then kept repeating it the rest of the day!
What do you think?