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.
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.