conditional branching and progress bar / Previous

I have a survey with 3 pages. Page 1 has a question that will branch to page 3 if answered. When I answer the question on page 1, I get forwarded to page 3 as expected but the progress bar says "Page 2 of 3" even though the progress bar is now to 100% since I'm really on page 3.

If I then click the "Previous" button, I go back to page 2, not page 1, even though I skipped over page 2 based on the answers and conditional branching on page 1.

If I go back to page 1 and change my answer, I should now go to page 2 but the change the conditional branching is still done and I'm taken to Page 3. There seems to be a problem related to Next/Previous and conditional branching.