export e-book to pgn

[Jonathan003]

If I import a pgn file into an e-book with Chess Opening Wizard pro, (the pgn is made by importing the best moves of a bin book in Lucas chess, to opening lines, and exporting back to pgn.)
And I export this e-book again to multiple games in Chess Opening Wizard Pro.
The amount of games in the output is about 10 times less than the input. About 6000 games instead of 60.000 games.
Also the frequency of the moves at certain nodes is changed.
https://imgur.com/a/Vy4Wm6e

Left is the original pgn from the output of Lucas Chess. Right is after importing and exporting the games with Chess Opening Wizard.You can see that 1.Nf3 is now the main move, instead of 1.d4
I'm not saying that it is a bad thing that the amount of games are now divided by 10. In fact it can be good if all variations are maintained.
But I want to understand it before I decide to use it.
My guess is that it has something to do with the high number of transpositions in the input pgn. (Not all of these transpositions are useful to include in my opinion.)
I'm more worried about the frequency of the moves that are changed after exporting the games with Chess Opening Wizard pro.
I use Chess Opening Wizard Pro build 192.

[OliviaParker]

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