I'm not good at understanding children

Wzg worked in basement whole night last night. So it was all me and Sophia time. When it came to bed time I asked Sophia to clean up her toys. I was using a very soft tone and worked with her very nicely. The weird thing is after cleaning she walked to her timeout spot and faced to the wall, started to timeout herself. I was totally speechless. I didn't say anything bad to her, I didn't even mention timeout and we played very well through the whole night. How did she come up with "timeout"? I must say I wondered if she had similar experience at daycare. Maybe She did sth wrong and teacher asked her to clean up toys and timeout. I'm thinking if I should ask her teacher.
But after talking with fishies I felt that I don't understand Sophia very well. And it's probably too early to give her timeout. Redirection is a good way to tell a 22 month old what is right and what is wrong.