How Priority transfer order in Serie A works?

[syrreel]

Hi there

I can't get one thing. When i've buying 2 or more players not from EU and first day of opened  transfer window in Serie A is came i get an email in which i have to choose one player who i want to request to squad. 

But when i choose some and click apply button system tells me that i didnt choose any player so it choose random player who i didnt want. 

Don't sure what is the problem and how i can choose player, there is only checkboxes near players and one button. but any choise i do message is the same. System tells me i didnt get the choise

 

THanks