We have the module running : https://www.networkyou.org/Donate.aspx

Issue is this.

Put in a value, say $50 and the cart progresses as we like to the cart.

Push the Continue shopping button, to change your mind on the donation, say to make it $200, and press donate.

We would expect either, $50 + $200 = $250. Or even just $200.  But what we get is 2 x $50 = $100 (the original donation amount). 

Inother words, the cart is caching the original donation amount, and seeing the amount as a second order of the same amount.

This logic is confusing to end users in customer specified amount mode. Can we have that changed to perform better in the user entered amount mode?