Moving Multiple Records
Select several records at the same time. You will notice that the folder list looks different here. You now have double tipped arrows. They are actually separate arrows, a left-pointing red and a right-pointing green.
If you click on the red () half, any of the selected records that exist in that folder will be removed. If you click on the green () half, the selected records will be copied into that folder.
In the case of multiple records having been selected, the red () arrows do not indicate if those records already reside in the folder.