Yeah, all issues in the backlog should be sorted by priority. But a separate priority flag is still useful to indicate critical bugs. A high priority issue mean

Yeah, all issues in the backlog should be sorted by priority. But a separate priority flag is still useful to indicate critical bugs. A high priority issue means you should drop everything and deploy a hotfix ASAP. This is not communicated by just moving the issue to the top of the backlog. But no need for multiple levels.