Things to check:
1) Partial Update when putting existing children under variation
Update when creating new parent
2) Standard_price must be deleted if there is a price listed on amazon and must be added if price is unavailable, incorrect, or you are adding sizes
3) Parent SKU in variation section must match assigned parent
4) Amazon_NA for all Amazon fulfilled SKUs
5) Each style must have DIFFERENT color names (Note: size map can be the same)
- If two different styles are listed with the same color, Amazon will incorrectly group them under the same variation on the page
- If two different styles are listed with the same color and size, the parent cannot be linked to them, resulting in orphaned ASINs
- Note: Before changing the color or size for one of the styles, make sure to switch the product identifier from UPC to ASIN