Woo Taxonomies and Attributes not coming through as Shopify Metafileds

Hi there, we have the premium version of your plugin. We have a shoes store in Woo and we want to migrate to Shopify. We have done the mapping as per your instructions but we face the following issues:

1. No taxonomies or attributes are coming through to Shopify. We have done mapping following your guide like below:
pa_heel-high –> custom.heel_height
pa_brand –> Vendor
product_tag –> custom.wootags
product_cat –> custom.woocategory

2. Shoes Variations come to Shopify ONLY if they are in Stock. Out of Stock Size variations of the product don’t come at all.

3. Once we run a migration for 2 specific products, if we run again for the same products it says Import Completed No data to Import.

Can you please help on the above?

Kind Regards
George