Not all orders get imported from Shopify

Hi there,

Using your premium plugin we imported only 53.852 orders out of 66.392 existing orders in our Shopify platform.
We tried to re-import smaller batch of orders (limiting to one month 2020-02) but it did not add more than we already had for that month (for 2020-02 we had 261 out of 291 orders imported).