Hi,
1. 3.: Error 414 usually indicates a too long URL, some servers have a specific restriction, although it is very rare. I changed this option to overcome the problem: https://i.imgur.com/R89Fj81.png
2. I believe is due to the fact, that the search results layout is set to block, instead of the default ‘hover’. In that case the position is not relative, thus z-index has no effect. Changing back the layout to hover mode should very likely resolve the problem: https://i.imgur.com/d2zmo8a.png
