Editor issues

I’ve just installed the plugin and have imported subscribers which is fine.
I’m setting up a template to use but having issues with the editor.
I used the CTA 2015 template. I have added some images and text. I have some bullet lists within the text areas but when I format them to be left aligned with italics, i then click Save and the bullet lists change to centre aligned with the bullet points over on the left side. I change them back to left align again and save and the same thing happens.

I’m also finding sometimes when I use the backspace key, the screen moves back to the top of the page again rather than just moving the cursor back one space. I’ve also formatted a header area with the client details and again when I have saved it, the formatting has all changed.