Plugin doubling price

When adding any payment amount, partial or full, instead of charging a partial payment, the plugin *adds* to the total. For example, if the product is $100, and I put a partial payment of $50, it charges the customer $150. If I put a (full) payment of $100, it charges the customer $200.

You can see an example of this behavior here:
https://imstat.org/shop/publication-charge-funding-form/

I’ve disabled other WooCommerce plugins, so the behavior seems to be originating from your plugin. Can you help?

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