I use the WebUI. In the center column, you can sort by either Artist or Album, and either in alphabetical order or in the order loaded onto the unit. When you select an Artist, the albums for that artist are displayed in the upper right portion of the screen. When you selec an album, the tracks for that album are displayed on the lower right portion. There is a play arrow by each artist, album, and track name.
Random is enabled by clicking on the icon that looks like two entwined arrows. When the icon is lit, random is enabled. Random works for the entire catalog or within a specific playlist. Currently, random play within an artist or album is not a feature, although it is on the wish list.