Take a look on the uploaded picture. It shows two errors:

1.) I synched the contact "Accento ApartHotel Hotel" from my Android phone. There was one error, the phone number was "other". I changed it on the phone to "office" and synched again. After this I get the information displayed like on the uploaded picture shown :-( Thunderbird displays it correct, SOGo Webfrontend not. The "office" number is ignored, only shown as featured number.

2.) Contacts without name, only with the company name are displayed without name. Thunderbird displays it correct.

Additional I found a third display error:

If I sychronize a contact only with a "other" telephon number, SOGo displays the telephone number only as featured number, at the properties this number isn't displayed.
I think this is a logic error because SOGo only understands contacts with one "office" and and one "private" section, but WEBDav knows unlimited sections / entries with more options.