I'm trying to dissolve faces, but half the time it doesn't dissolve them but instead moves the origin to the middle of a face on my object. The same face every time. Why??

I'm trying to dissolve faces, but half the time it doesn't dissolve them but instead moves the origin to the middle of a face on my object. The same face every time. Why??

I think you are confused about how to use dissolve.. or about the differences between dissolve and delete:
check this fast video I made for you:
https://www.youtube.com/watch?v=7vEnOqUZ7Lk
also check:
Differences between dissolve and delete?
and this:
