My theme is using this product loop to show chosen products on the home page. However, the results are acting really weird - some products seems to cause it to stop before getting all products, hence only showing around 13 products instead of the desired 16 ones. When trying to load more, it loads some of the same products again.
I have tried contacting my theme developer, but they won't aknowledge the error, since they cant recreate it.
Life demo of the error - see featured products just below the banner on frontpage