I think all this can be cleared up if you look above the video player on the lesson pages and see the navigation buttons that are red rectangles with white text that read NEXT and PREVIOUS.

Originally Posted by: rantu1. How many videos are there in the complete Blues1 and Blues2 tutorials ?[/quote]
Over 100.

Originally Posted by: rantuI got 29 videos for Blues1 and 27 for Blues2 - so that is a video per lesson. Is that right or there are more ? Is there more than one video per lesson ?

You counted only 29 because you are only counting and looking at the first lesson in each chapter. You have to click the next button to see all the lessons in the course.

When you click begin course you went to the first lesson of the first chapter. The if you click on the right hand Course Menu navigation link you will go to the first lesson of the second chapter. You will miss all the other five lessons in chapter one!
[QUOTE=rantu]Instructors keep changing with every lesson - is that right ? Or I am making some mistake ?

Instructors sometimes change with every chapter. Once a chapter starts the same instructor will show you all the material in a chapter. Have a look at this image and please hit the NEXT button! :)