Small problems with the site and the forum

For almost 3 years of using the site I have always been confronted with 2 bugs which in the long run can be annoying.
The 1st takes place on the official site (not forum), when I access it 1/10 I am not automatically connected to my account although I have registered it and it does not happen with others.
The second takes place on the forum via a mobile browser, the forum seems to take a display for mobile much better adapted but it returns each time after 1 second to the PC format which is less practical on mobile.
I had tried it on different browsers but I have always had these problems which are not serious but which make it less comfortable to use.