Theme Editing – Constantly Returning to Default

Hello, I purchased the construction pro theme. There are quite a few bugs. After installing the update I was able to correctly change theme color on the front end customization. I wasn't having any problems until I inserted a custom image into the featured slider (after changing the CSS height of the image). After I uploaded the image and published the page the entire site went to default. I'm thinking that there is a theme/code issue with the featured slider portion of the theme. Additionally, when on the front end customization it is leaving a few things updates out such as CTA and text associated with it. I am open to any and all solutions and am considered to be a novice at wordpress. I love the theme design, however, I don't know if it is worth the 50$ with all of these bugs. (I understand it is a new theme, and you are still working out all of the glitches.) Another question I have is changing the image size of the logo in site identity, whenever I attempt to change the CSS using site origin it does not let me go past a certain width, it seems the width has a cap on it.