Error "INTRUSIÓN" at the confirmation of bankwire

[VmTiz]

Hi, I've been using Prestashop for some months and I haven't been able to solve this problem, I've been searched the forums but had no luck, hope you can help me:
The product offered is a printed picture and has 3 options for sizes, the error happens when I chose a size different than the base one and I proceed to confirm the shopping cart, at the Payment step after pressing the confirm button, I get:

INTRUSIÓN (Order -> total_products = 51966.389999999999417923390865325927734375)

I'm not sure if the problem is because of an incompatibility of decimals (it shows a lot in the error) or the tax (VAT in this case), because the value present in the error is the net value 51.966.

This problem happens when I do the procedure online, through the uploaded version, but if I try this locally, this is through MAMP everything works fine.
I'm using Prestashop 1.3.1 in Spanish.

[Divine]