Wrong short name for A. Bilbao C

Which page exactly did you see this on? When we test this on our end it looks to be showing correctly. 

It is in the calendar you see while the game is processing after clicking on continue. In the little card it shows for affiliate team matches they appear as Bilb B whether it is the second or the third team. You can set a friendly match for A. Bilbao C a few days in the future so it is within the week in the calendar to see it.

Just in case it affects, I play in Spanish, but it also shows to me when I change language to British English.

We'll take a look into this, thanks for the spot, should be resolved soon.