Wrong cache hit

[IrPr]

Hi there,
I'm seeing a very unexpected and unknown act by Litespeed cache feature

Here is my cache Policy config:

  <cache>
    <storage>
      <cacheStorePath>/dev/shm/lswscache</cacheStorePath>
      <maxCacheObjSize>102400</maxCacheObjSize>
    </storage>
    <cachePolicy>
      <enableCache>0</enableCache>
      <expireInSeconds></expireInSeconds>
      <qsCache>1</qsCache>
      <reqCookieCache>1</reqCookieCache>
      <respCookieCache>1</respCookieCache>
      <ignoreReqCacheCtrl>1</ignoreReqCacheCtrl>
      <ignoreRespCacheCtrl>1</ignoreRespCacheCtrl>
    </cachePolicy>
  </cache>

here is my full htaccess with cache-control rewrite rule:

RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !\.(jpg|gif|jpeg|png|css|ico|js|swf|zip|rar|mp3|exe) [NC]
RewriteRule . /index.php [L,E=Cache-Control:max-age=900]
</IfModule>

This is a big wordpress which I've enabled cache for its contents
They're using SEO plugin and urls are in this format:

/year/month/day/title/

While most of links are cached and fetched properly sometimes a few urls are fetching wrong content instead
for example /2011/06/09/title1 returns the content of another post, /2011/06/09/title2

It returns wrong content for all requests for that url till pruning cache dir while the other cached contents are working properly

I'm using Cache feature on many servers with the same rules for WP, all of them are working like a charm but this one

Please note that its not occurring for WP only, there are other CMS such as PHPNuke which the same issue is happening with SEO rewrited urls, and the most unexpected thing is that they're fetching the contents from each other websites!
The only matching thing between these URLs is that they're non-existing files SEO rewrite rules, but not the same cond/rules

Seems there is a problem while saving the item to the cache to me

PS: All 4.1x versions are affected

Any idea is welcome

Thanks