Fix an issue on a customized form on Wordpress (Gravity Forms)

We have a custom multi-step form using Gravity Forms which has a small issue we need fixed.

Here is the page with the form on it:

https://www.memorare.co.uk/product/double-folder-cards/

The problem occurs at the adding to cart stage. The options that the user has selected from the radio button / image choice fields are often incorrect.

I have tested it extensively and have been able to replicate the issue. The issue applies to all forms but I've been testing with the Double folder Cards form (via the link above)

On Step 1, if you browse through the cards, clicking on the numbers 1..2..3..4..5..6...7..8..9 and then finish the step by selecting a previous card e.g. 3. Once you've completed the form, at the shopping cart it shows the highest number that you clicked on as the chosen card, in this case 9, instead of the correct one, 3.

The same applies to all the image choice steps within the form.

So it's taking the SECOND LAST selection as the chosen option, rather than the last.

I need someone who can understand why this is happening and fix it.

Please only get in touch if you have visited the above link, went through the order process, understand the issue and know how to solve it.