Fix some issues on my shopify store

I have a swimwear store on shopify. I have some issues caused by another developer and I had to remove him from the job as he was really terrible and he has left some site with these issues on mobile.

See screenshots of the issues. These are both on mobile. Firstly the logo is repeating here as shown when you click on the menu button (3 lines).

Secondly when you on the quick buy cart icon on the collection page the pop up appears as shown in the second screenshot - it is all cut off and like it is under the logo.

This theme is live and it is our high season now so I will need these issues fixed urgently. Please only accept the job if you can do the changes immediately