I took a quick look at the source code for
https://yourstory.com/, and ... WOW!
Definitely not your traditional HTML! I'll have to look deeper, but at this moment I'm not sure Sphider is sophisticated enough to digest it.
I'll check deeper and elaborate.
EDIT/UPDATE: This site is proving difficult to index. The connection keeps dropping, but I can s-l-o-w-l-y progress. I did manage to index 41 pages and a total of 2386 keywords before I grew tired to "continuing" a suspended index.
I do see that the sitemap.xml for this site is a listing of 753 other sitemaps (which is totally valid for large search engines such as Bing, Google, Yahoo, etc. Unfortunately, Sphider (being the lightweight that it is) does not have that capability. (This may actually be opportunity for improvement!)
There are SOME pages return a 301 code, but as I said, I did get 41 pages index and could continue on, but getting dropped after every few pages is rather frustrating. MAYBE increasing the delay between calls (in settings) would help.
Since you seem to be getting a 301 right out of the gate, it might be useful to see if you are getting any php errors. In spider.php, lines 34 and 35 (33 and 34 in the lite version), swap the comments to enable error reporting.