So, it isn't the name of the bookmark and the name of the page that matters. It is the actual state of the content on the page when navigated to, and the content when the bookmark was created. When you look at an existing bookmark on the bookmarks pane you can choose to have the bookmark set to "Data/Display/Current page" as well as "All visuals/Selected visuals". The state of each of these items in the bookmark would have to match the state of the items on the page when you navigate to it by clicking on the page name instead of using a bookmark link.
So, for example, if you have a page with just a table and a slicer (and the bookmark navigator of course):
1. Set the slicer to ALL, create the bookmark, and add it to the navigator.
2. Change the slicer to select an item. You no longer "match" the bookmark, but the navigator still shows it highlighted because that's the last bookmark it "remembers"
3. Use the navigator to go to another bookmark, then use it again to return
4. Your slicer should have reverted to ALL because that's what the bookmark was set to
5. Change the slicer to select an item again, and once again use the navigator to go to a different bookmark
6. This time, click on the page name to return to the example. The navigator will still show the "other" bookmark selected because the slicer doesn't match what you saved in the bookmark. Since they don't match "exactly" it doesn't register that it has hit a bookmark and so it retains the last "remembered" bookmark it was used for
You'd have to select the table and NOT the slicer, then update the bookmark to selected visuals only, then when you navigate to the page, only the table state would be compared to the bookmark. This may be true for sorting of the columns as well (I've not looked that deeply into it)
I hope this helps, and good luck!
