Double Entry?

Hello,

This page
https://en.numista.com/catalogue/pieces1041.html
The 1 Cent of Netherlands Antilles
Why are there two lines for 2015 Sails?
Is it a mistake or are there actually two different 2015 coins?

Same with
https://en.numista.com/catalogue/pieces1043.html
Two entries of 2016 Sails with Stars

And also
https://en.numista.com/catalogue/pieces2937.html
Two entries of 2016 Sails with Stars

And
https://en.numista.com/catalogue/pieces8976.html
Two entries of 2016 Sails with Stars

Hello.
It seems like a mistake. It's easy to fix, but first let the referee look at it. I sent him a message.

Hi Salaction,

thanks for noticing. I'll have a look at it!

Kind regards,
Eddie

The extra dates deleted.
Thank you.

https://en.numista.com/catalogue/pieces48506.html
Same, double "?"
Idk how to delete it from the edit page

Ok, I deleted the extra line. Thank you.