Forum Moderators: Robert Charlton & goodroi
I can think of two reasons this can happen.
1. - The snippet showing in the results where your ranking for #2 is more attractive to the user so they click it more frequently. (Or the snippet for the #1 spot is less attractive).
2. - You can be #25 on a very popular search term and get more clicks than #1 on an less popular (obscure) search term.