Update website

Hello, Our website [login to view URL] was designed with WordPress and is being hosted on SiteGround. We would like to correct the following issues. A. Blog is [login to view URL] When “Click to Select a Topic” is in the window all post display. Select a category from the drop down menu like "Accessories" the list displays the correct post. Return to the drop down menu and click "Select a Topic" the list will not display all post. To display all post must exit the blog and re-enter. We would like all the blogs to display when Select a Topic is selected. B. When viewing the home page on mobile devices it is to large. Bing suggest inserting Consider using the following viewport settings to ensure that your page works well on mobile devices <meta name="viewport" content="width=device-width, initial-scale=1"> C. Our photo gallery is [login to view URL] Select a thumb nail from the top slide bar and the pic displays in the larger window below. Use an arrow on the right to view the next picture of the same kitchen. Click the thumb nail and the pic remains the same and will not return to the thumb nail pic. This is true even if viewing different pictures. When the thumb nail is selected we would like the photo to display. When viewing the larger pictures there are arrows left and right even when pictures are not available. We would like arrows removed when there isn't any more pics to display. This would be true for both the left and right arrows. Slider bar at top of page moves one thumb nail at a time when arrows are click on. Would like them to scroll if arrows are held down.