Ordering attributes on product page

[nunofc]

Hello.

 

We have a clothing store based on Prestashop 1.6.1.6.

There's an issue we noticed and are not beeing able to solve, so we decided to ask for a little help.

 

On the product sheet (Backoffice) the combinations for each product are added in the following order:

 

 

Note that we only use 1 color per product, so the variations are in the size.

As you see, it looks like 36, 37, 38, 39...

 

But when we look into the product sheet on the Front Office, the drop down menu where you may choose your size looks a total mess with no order at all:

 

 

Is there any code we may enter on product.tpl file so the sizes on the drop down menu (Front office product sheet) appear in the same order as added on the Backoffice (first image)?

 

Thanks in advance for any kind of help!

 

This issue makes the product page not look clean at all...

 

Best regards,

Nuno Costa