When executing your task, you might encounter a confusing larger amount of items imported to target than were exported from the source to begin with.
Does that imply there's a bug? Not at all!
In most cases this will happen with the Products entity, and related ones, but might also apply to other entities across various integration options.
For example:
How an export of 13 items at source can be processed as a total of 26 items, to finally be sent to target as 8 items?
Here's the logic and calculations behind these seemingly random amounts:
there are 3 products that had a total of 16 variations
(2 products with 6 variations and 1 product with 4 variations (2x6+4=16)
So, 10 variation products (10 products with 1 variation per product)
plus 16 variation products (3 products with a total of 16 items/variation products) = 26 items.
IIIIII x 2 + |||| + |||||||||| = 26 items (or product variations)
1 2 3 = 3 products in total
Target only receives 8 items because you have only 8 "parent products/variable products" paired with Variations. Consequently, each Variable(parent) product may contain several Child products.