I understand this situation is frustrating; at the same time, it can be a blessing in disguise, so don't lose heart! Try to look at this situation through the lens of connection:
1) You have an opportunity to build an alliance with a faculty member who sees value in students visiting the learning center; and
2) You have students visiting your center who might not otherwise come into it.
Both are great opportunities for relationship-building, so it is important not to lose sight of that, even though you and your tutors might be feeling (understandably) frustrated.
What I would tell my team in this situation is that this is an opportunity to change the narrative about our learning center for this professor and group of students from a deficit-model to a growth model perspective. I would tell the tutors that their mission is to give the students a reason to come back to the learning center, now that they're here.
One way they can do this is to set long-term goals with their students. For example, the tutors can ask: What do they (the students) want to be able to do as a student that they cannot yet do? The tutor can then help their students make an action plan to address these goals--which might require them to come back to the learning center for more sessions! They should also set and accomplish the goal of completing the assignment the professor sent them to the learning center to complete, of course, but, after that, it's time for the tutors to up their game and help their students focus on their continued growth as learners.
It's natural to wonder whether students who are reluctant to come to tutoring because they are required to do so are quote-on-quote "taking appointments from other students," but the fact is--the students sent by this professor are there in your center, they are students, and the other theoretical students are not there. So the ones sent by this faculty member deserve all of the energy your tutors can give them. And maybe they will decide to come back or at least have a positive experience that they tell other students about. And maybe you will have a new faculty ally in your circle. It could be a win-win.
Southwestern College (San Diego, CA)
CRLA Level 3 Master Tutor
Certified Learning Center Professional - Level 3