I've come back from mat leave this week, my manager offered me a permanent part-time contract.
I did my first shifts last week and went into work today to pick up a few things, whilst there I nipped in to say hi to the full-time staff member who does the same job as me. (I trained her when she first started)
She told me how awful her day had been due to my work and how she's had to spend the day changing everything. I apologised and explained I was only trying to help and I didn't realise I'd made so many mistakes. She kept going on and on about these errors and how awful her day was. In the end I walked away as I had no idea how to respond after apologising. It's worth noting another full time member of staff was stood there too, but not speaking.
I have to go back this weekend and I feel completely mortified. I've got a knot in my stomach about it all. I'm hoping it will pass and she's just feeling like I'm stepping on her toes or something. I really thought I'd done a good job!? 