We sometimes do not finish an issue during a sprint. Then we dont want the entire workload moved to the next sprint, since some of it was done. Say for example that a story was estimated to 8 storypoints, and 5 were done. We would like to be able to deminish the 8 to a 5 without loosing the information that it was originally 8, so that when the work is done we still know that we made a totalt of 8 story points.
Is the above the way one should use original story points? Is one supposed to at first estimation write original story points 8 + story points 8, and then when the issue is moved to sprint 2, change story points to 5 but leave 8 in original story points?