I don't know if it's just me or if it is well known, but I haven't found it neither in recent messages nor in Top all time. Well...
The strenght bar has 5 fields. So one would think, that there are five possible stages of a skill - one field, two, three, four and five = golden. However it doesn't work that way for me. I've never seen two fields. When I practive a skill that has only one field than it jumps to three and when it degrades it goes from 3 directly to 1. Is that normal or is it something happening to me only?
That's normal. Before the design change skills had 4 bars (fields) so that might be the reason why it is happening like that.
never noticed it, but you're right, all the individual skills have either 1,3,4 or 5 bars for me as well. however, the total skill (in the main screen, below the language progress bar) DOES show 2 bars if that's your overall average.