Yes, the order of the tags when I create a LingQ makes me crazy. It’s fine to have the most popular hints at the beginning (maybe 10 items), but than an alphabetical order would be much more convenient.
By the way, here you can find another thread about tags:
@Michele: Ich habe etwas über Tags in einer deutschen Lektion geschrieben: Login - LingQ
@jpljpl - These frequency (or Importance) ratings are calculated on the database. It simply looks at all of the text on the site to see how many times the word appears, then assigns the word an appropriate number of stars.