Changing the order of list columns (date, from, subject...)

[Niro]

Hi, I can drag the columns  into this order:  From, Subject, Date, To, but as soon as I open an email and then go back to the folder (any folder) only the "subject" column displays.  The same thing happens if I go back, or forward a page, or open another folder.    My website company claims that Roundcube changed the ability to drag the columns into a new order, but that doesn't make sense as I can drag the columns into the order I want - they just don't stay in that order, and in fact, all but the Subject column disappear after I move pages, or open an email.
Thank you so much in advance!