If you have a fail it could be a file and not the folder.
If you click on it it will expand and show the files And what file failed.
Probably best method would be check the permissions on what failed against what is okay in the same folder.
There have been issues with some software we use to change file folder permissions. Where they really don't change permissions.
I have had that issue with windows servers. Since you really don't have the chmod setting to deal with.
For me I have never had a issue with filezilla.
If you are stuck. List in detail the three items that failed. And what they are set for.
FYI,
From the installation docs it states.
styles/ directory: set permissions to 0777
files within the styles/ directory: set permissions to 0666
