Why won't the payment amount copy after I change from one amount to the next?

Why won't the payment amount copy after I change from one amount to the next?

When, I click either payment amount for the first time it is copied to the "registration total" field and that amount appears in the payment box. 

However, if I go back to change for example, $75 to $110, the amount doesn't copy to the "registration total" field. It functions like this every time I change the amount to be paid. 

How can I fix this?

I want our online form submission experience to be seamless for both my clients and the business. And, this problem can lead to a discrepency with the payment amount, while creating more work on my end to resolve it. This form is to alleviate previous problems for my clients and the business. Therefore, I truly hope you all have solution for this. I'm depending on it. 

Thank you

I cloned your form and modified it. You can view/clone it:

https://form.jotformpro.com/72143873604961

I deleted the conditions inside the form calculation widget.

And I modified condition 1 and condition 2.