To provide a clear reason and include all the details plus specific sources to answer your comment @juvyjabian:

The post reward value listed on the post before the payout includes everything paid out to the author and the curators (people who upvote the post). The split is 75% for the author and 25% to the curators, that is indeed fully correct if nobody votes <30 minutes from the post publishing moment. Anyone who upvotes before 30 mins passed gives some of the curation reward back to the author.
The post reward listed on the post after the payout includes only what was paid to the author.

To see the exact amounts that I'm referring to above go to your post, in the url, directly in the browser, change steemit.com with steemd.com (you can change only it to d but I wanted to give the whole picture) and you will see more details about your post.
For the top box you will see some json_metadata. In that place look for:
total_payout_value 260.076 SBD
curator_payout_value 86.441 SBD

The rest is rather clear I believe.