This question already has an answer here:
Two months ago, I submitted a (mathematical) paper to a journal. On the journal's website, there is a status concerning the paper, e.g. "Rejected", "Awaiting reviewer selection" and so on.
About two weeks ago, the submitted paper's status was "Awaiting reviewer assignment", and then it changed to "Awaiting reviewer selection". This seems more like a backtrack in terms of statuses rather than a step forward to get the paper reviewed (correct me if I'm wrong).
Now my question is:
What could be the reason for that step back in terms of statuses?
(I always thought that if somebody declines to review the paper for some reason, then it will be rejected?)