I have a simple 4 step process where a user goes into each step, chooses items and checks out at the last step. A fixed overview sits to the left of the page and tells users what their choices have been.
My question is if I reach the last step (4) and I see that I want to edit step 2 should the progress bar go back to step 2 like in the attached image?
Important to note is that the entire process and all steps are on one single page. The user clicks "next" to reveal the next step in the process.
Should I have an indication of completed steps vs. current steps?