We have a sprint planning every sprint which takes 2 hours. In this little time we discuss 10 user stories, write them down and estimate them.
Very often after the estimation (during sprint) I realize that the estimation was bad because the technical solution takes more time as we did not really and exaustively talk about the problem. This puts always lots of pressure on me.
In this sprint planning I must also say we talk to much. It could be more focused.
In scrum is it really enough to plan the task for a user story in the sprint planning or should there be more meetings or other meetings for this task?