Hello @Carriehill and @Aboz97, thanks for joining the Fitbit Community, it's great to have you on board.

Thanks for bringing this situation to my attention and thanks @Aboz97 for your recommendations. Please note that when categorizing an activity (recorded automatically with your Fitbit device) through the Fitbit app you will be able to choose between your recent activities and many others using the Search bar. However if you'd like to use a custom activity such as "Curves" to categorize your exercise you will first need to create that custom activity in order for it to be selected.

To create a Custom Activity:

Log into your fitbit.com dashboard. At the top of the page click Log > Activities. Click a common activity or search for one If the activity is not in our system, create your own by clicking the Create custom activity text that appears below the search field. Enter the duration, distance (if applicable), and start time of your activity. You can enter the number of calories burned if you'd like to. Click Log Activity. Your activity will now be visible and editable in the Logged Activities area.

Once recorded you will be able to select it or search for it when categorizing an exercise.

I hope this can be helpful, give it a try and keep me posted in case you need anything else.

I hope this can be helpful, give it a try and keep me posted!