Some help needed please with various issues

Hi Mark

As per my support ticket, I am posting the queries in the forum.

Right I have attached a screen shot with the most immediate issues we are having. Please let us know how to resolve them

1. When the menu is coloured anything other than the default, when someone hovers over it it ‘jumps’ to the right. Is this intended to work this way or a bug?

2. We are looking to expand our header and have it span the page like we have here.
https://coraltrader.zendesk.com/access/unauthenticated
How would we go about it and what file would need editing please?

3. The prices on the auctions display in dollars even though all the site settings and auctions actually display in pounds. How would we fix this?

4. We would like to change the brown buttons/features on the site to something else. Are these images that will need to be edited or is there a file where the colours can be edited?

5. The images display as different sizes on the home page. As per the support ticket I have updated to ver 4.6 but still have the issue of different sizes. Is this a setting that we have missed?

Thanks in advance for helping us resolve these issues.

Regards
Jason