for some reason when I select all pages and and start scraping it starts from the last page and goes backwards.
Same happens when I create a scraper with a url like this: http://example.com/page/[1-3]
it starts from page 3, then 2, then 1.
What am I doing wrong?
You are not doing anything wrong. Web scraper queues links from last to first.
in the video tutorial it shows that the queue is from first to last.
in addition how can I do pagination where you don't have all pages listed, they show only when you move forwaed.