Pool training workouts, why my F5s still empty ?

Hello, firstly sorry I have my f5S with french menu but I think I can explain you my "problem".

In running, I can add workouts in GC calendar or by sending with website/GC soft combo directly to the watch and I found them on my watch.

In pool swimming, I can add  workouts in GC calendar and I found them. But sending them to the watch still don't work. The watch still told me to use Garmin Connect to have workouts. 

It's very tired me to add always a couple on workouts to the calendar and "lost" them the day after...

2 questions : 

Am I the one to notice that ?

Is there a technic to send this workouts, for exemple in a specific folder when the watch is in USB mode ?

If my subject is not clear, tell me to more developing

Thx you.