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It is because you are using one of our theme which is by default positioned to the right.
If you want to position it to the left, you can add this custom CSS code:
margin-left: 0px !important;
width: 100% !important;
Here's a guide: How-to-Inject-Custom-CSS-Codes
Hope that answered your question. Feel free to contact us again if you have any inquiries. Thanks!