Is the Daily Achievement point bug?
You reached your cap (15000). Zillions of posts about it here but you have to use google to search the forum since it is sooooooo broke.
https://wiki.guildwars2.com/wiki/Daily
a couple of lines down.
and this one is fairly recent for a read
https://forum-en.gw2archive.eu/forum/game/gw2/Remove-the-Cap-on-Daily-Achievement-Points/first#post6509609
(edited by Blude.6812)