Hi,

Yes it happens that way sometimes....if you can't adjust it until it just works, you may have to resort to the brute force approach and move the sprocket until an interference fit on some of the spokes happens and then sometimes you can just get the 9th one in.....barring getting lucky that way, I have sometimes loosened spokes until I got the bolt through and then re-tightened them to ensure a true wheel....that takes a little doing sometimes....it will eventually work tho.
Hope this helps.
Andrew