Widget NewsAnchor : recent post A & B diplay on 2 columns

Hello,
I’ve had 2 the different widgets to my homepage. They are displaying but on one column and not two as shows on the demo site.
I’ve read a post about the same issue, but it’s quite old now : Recent posts widget Type B problem so maybe the answer (wich I don’t understand) is not accurate.
Here’s the result :

Do you have any idea ?
The old answer was : “Have you added the Recent Posts Type B Widgets in a 2column Row ( 50%-50% )? If yes, then that may be the problem”.

Thanks,
Eiffell