strong Joomla and Virtuemart developer with excellent MySQL knowladge

I have a site: [login to view URL] That have online store: [login to view URL] It is needed to solve several issues with site. Full description with pictures is attached. Descritption without pictures is below: 1. 1. Pictures at the main page appeared with delay: [login to view URL] 2. Site generates excess cache. Size of the cache is more than 2000 Mb. I think due to incorrect cache generation (several caching rules are used). Don’t know why. 3. Menu that separates different groups of goods doesn’t work. 3.1. Problem with duplication in the URL “/catalog/catalog/” Please check below description: There is a link to main page of the online store: [login to view URL] When I click at the Menu thank must direct me to the main page of the store, system use such link: [login to view URL] wich have the same content as at the page with link: [login to view URL] 3.2. When I choose some of the products, system dupclicate in the URL word /catalog/ and URL looki like …/catalog/catalog/… Please check below: [login to view URL] 1. It is needed to run SSL at the site. [login to view URL] 2. Update Joomla to newest version. 3. Encrease speed of the images at the main page of the store. They are downloading much slower than pictures at other pages. 4. When I’m opening page with product, at first seconds maing image of the product displayed in big size (600x500 px), than in a few seconds it became normal (approximately 200x300 pixels).