Bulk upload after Dynamic Groups

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Just had Dynamic Groups enabled today and I seem to be missing the option to assign bulk users to a group.

Prior to going live with DGs the Users > Bulk Uploader tool had options to both change a user's membership and to place them in a group. I used the latter all the time to create custom mapping / reporting groups. Once DGs were turned on the only thing that I'm seeing in the Bulk Loader is the ability to change membership. The option to also place users into a group is missing. I have to rebuild all of my old groups and one of them is over 500 users. Should the option be there or has the processed changed?