It is slightly strange that the included php.ini-file has settings wich does not support the preferred settings according to the installation file.

Another question is why it is positioned in recommends => icons when it, to be active (at least on my sitearea) must be placed in "installation" -folder)

Two related possibilities. Since server configurations vary so much, I see the included php.ini file as more of an example, rather than an authoritative setup file. As to why it's located down in recommends/icons, who knows? Maybe something psychological/memory reminder-related about it being 'recommended'... On my shared-host I have to include the php.ini file in my root directory and sometimes add it to subdirectories as well.