Please combine these Dune editions

[Lauren]

There are two editions of Dune listed that should be the same. Ace Books 1990, 25th anniversary edition.

This edition
https://www.goodreads.com/book/show/5...
this the edition I am reading right now, except it has the incorrect page count.

The correct page count (535) is here, but with an incorrect cover.
https://www.goodreads.com/book/show/5...

It would be great if a librarian could please combine the editions, and update the first one's page count. Thank you!