We do not have the ability to log for partner/team workouts right now. This is something we are working on and will release in a future update.
To keep an accurate record, you should only enter the work YOU did. Not the work between the two of you. Otherwise the system will think you did all of it!
Partner workouts won't affect a user's Fitness Level unless the workout is a designated Fitness Level workout.
There is no way to link anyone to the workout just yet, but we're working on ways to incorporate partner/team workouts into the system.
For a partner WOD, select modified and input the reps YOU did. You can also make a note in the notes sections