Separate the User Lookup Task from the Add Task
In other words: Remove the "Did You Mean?" section.
In the provided example, it's easy for a user to get distracted and wander off from the key task of adding a new user. Example: "I need to see if Thomas Jones is already in the system. Oh, there are two people called Thomas Jones... I wonder if ...
I think it's a design problem.
You are putting an unnecessary graphic limit at the card bottom: the black button.
By changing the location of this button, the number of "new users" can be 5 or twenty without generating any UI problem.
In this example the button is at the top not as a final solution but to show the design versatility without that ...
"Did you mean?" is out of context and demeaning for your purposes.
I would name it "Existing Matches" if you're interested in keeping the current interface. The other answer does a good job of suggesting the relocation so I'm not going to beat that dead horse.
Presumably the next step in your interface is to enter the person's full ...
Note: The better suggestion is below EDIT, but only if it is technically possible.
Since the extra button makes things overly complicated just omit it. You can add the "Close tab" option next to the "Create another" option:
Or add the options in a dropdown if this takes too much space.
In my opinion doing this only makes sense if closing ...