Why the number of products after migration differs from one that has been shown on Magento?
Magento is a shopping cart that has it’s own system of products number accounting. All the child products are counted as simple products in a row with their parent products.
That is why, if you are moving from Magento to shopping cart that has another accounting system, the number of products may be different.
In case you will have questions, please, feel free to contact our Support Team for further instructions.