SOBI2 extension and Alpha-Index

When using a hyphen as word separator and a hyphen is used in content article titles they are URL encoded (replaced with %11).
In SEF Advance there are 3 ways to avoid having encoded characters, aka strange chars in URL:

1) Put a replacement for a special character under "URL replace" in SEF Advance configurations.
In this example, since you use hyphen as word separator, the regular hyphens are URL encoded. To avoid that you could put something like "-=>_". This way all hyphens that occur in article titles will get replaced by underscores. Of course, then you can't have underscores in your titles but they are less often occuring.

2) Use short URLs (title alias) setting.
Then you are required to always enter a short version of your article title with latin chars only. This is also the best option for non-latin sites like russian, chinese, arabic etc.

3) Define manual alias.
Whereever you notice strange URL you can manually enter the alias for that URL and it will be used instead. Of course, this solution is not automatic.