Note that regarding voices, V switches to the next voice (and cycles through all voices), while Shift+V creates a new voice. If you’ve created several voices (i.e., more than one upstem and one downstem), they will shift sideways to make space for the extra voices to be independent. You will rarely need more than two active voices in most music (with the exception of some Bach contrapuntal organ music, and occasionally piano as well).
Get in the habit of creating the fewest number of voices needed to accomplish what you want - things will line up appropriately. If it is an XML import, the voices created can get pretty wonky. Turn on voice colors (View) to see exactly what is going on. Remember too that you can easily change voices by right-clicking on notes and following the menu options (Windows).