Extrenal csv label for multiple choice

What is the problem? Please be detailed.
I use csv data for labeling.
In the choice sheet a use last_name,first_name syntaxe
The résult is Dupont,First_name:Rémi instead of Dupont, Rémi
What option should I use to get the correct result?
What ODK tool and version are you using? And on what device and operating system version?
Odk 1 v1.17

Hi @Fabienne35

could you attach your form?

tst.xls (33 Ko)