Colors problem with Cura

[Vorkrom]

Hello,
I am having problems when I print with 2 colors. I use "Tinkercad" for the creation of models. And when I import my project on "Cura", I choose the 2 files ".stl" and when I do "Assembly for the double extrusion", the colors are inverted during the printing, whereas in the settings, j have the first nozzle in red and the second in black. I read on other topics that we had to change the T0 and the T1. What's wrong ? Is this my case too?
In advance, thank you for your help.

Vorkrom.