I apologize for the confusion, but there is no initial code provided in the context of our conversation. Without the original code to review and update, I cannot provide an improved version.

To proceed, I would need:

1. The initial code for the EasyInvoice web app (HTML, CSS, and JavaScript).
2. Specific suggestions for improvements or bug fixes.

Once these are provided, I can review the code, make the suggested improvements, and return the updated version. 

If you have the initial code available, please share it, and I'll be happy to work on the improvements based on the suggestions you've mentioned.