21 lessons/topic down to 4!?
I have completed the Ukrainian tree 3 times and there have been progressively more lessons per topic with each time through; however, the other day all of these switched from 12-24 lessons/topic back to just 2-8 like my first time through. Has this happened to anyone else? What's going on?
I'm not sure if this answers your question, but with each skill the lessons increase. It's not the same for all skills, but here's an example:
Skill (Cafe, Travel, etc.): 5 lessons
Lesson 1 - 1-3 exercises
Lesson 2 - 1-8 exercises
Lesson 3 - 1-12 exercises
Lesson 4 - 1-15 exercises
Lesson 5 - up to 30 exercises