Product weighting - any known issues?

Question

Quick ask - are there any known product weighting issues within the ecommerce module? 
Trying to do a simple sort by weighting, but it has not effect on product order display.
i.e.
Product 1 which is to display first is weighted as 3
Product 2 which is to display second is weighted as 2
Product 3 which is to display third is weighted as 1.
ta megan

Answer 1

Thanks Liam. That seems to have worked. This page: http://kb.worldsecuresystems.com/134/bc_1342.html#main_eCommerce shows  - though there is no reference to "weight" as you have mentioned.
Tag ref says:  Lists the products in the current catalogue (Use {tag_productlist,u,v,w,x,y,z} where u is the number of products per row; v is the target frame, e.g. _blank or leave empty; w is the number of products per page (limit of 500 products per page); x is the sort type, e.g. Price, or Alphabetical; y allows you to hide empty message, e.g. 'this catalog has no products' and z is list type). Change: {tag_productlist,4} to {tag_productlist,4,,,,,true} to display as LI.
So I made the overall shop layout tag show : {tag_productlist, 4,,12,weight,true}. After making this change, then applying weighting to each product, this now displayed products in the weighting order assigned to each item.