Issues after an almost fresh installation (added languages, currencies and a custom logo)

Thanks for helping me out, you theme is beautiful but I am dealing with multiple issues:

On internet explorer and firefox with the parallax layout:
- The slide image has an offset
- The main menu is not visible
- I couldn't find a was to add a module in the layout builder (seems to work with other layouts)

Here is a screenshot:
http://i.imgur.com/fv7luHE.jpg

On internet explorer and firefox, in every layout :
After sliding in a parallax page (contact page page for example) the logo become huge:
Screenshot :
http://i.imgur.com/MA7yzx6.png

Minor issue (to me):
In the parallax layout, the "feature" menu doesn't slide, it slides the next image in the gallery instead.

Lastly I noticed that adding a language doesn't translate anymore the pretashop front shop sentences, everything is blank and I am not sure if I will be brave enough to translate the 1500 sentences in 4 languages.

It is not an issue, but I would love to know how can we change the main logo vertical position to center it with the menu.

Thanks for your theme, I love the design and really want to stick with it.