If you have certain blocks "Locked" together, they all change to a sort of deep purple.
If you select a group of blocks, they become a deeper version of whatever color you've assigned them.
If you "Lock in Time" a group of wav blocks, they all become a single color.
Blocks don't mean "Tracks"- they are individual sections of wav file, and many can coexist within a track. You may have 3, or maybe 10 blocks of individual wav file in a single track, all treated differently, and in various 'states', to serve the arrangement. This accounts for a lot of colorful screenshots!
The example is an extensively edited arrangement involving many parts of recorded music, cut into sections, loops, repeated parts locked together (to facilitate their being moved together within the arrangement), etc.
This probably will answer your question. Learn to use the program a little more, and you'll get it.