Guild Wars 2

So a couple weeks ago some friends and I decided we were going to go through the story modes on a bunch of the dungeons to get exp modes unlocked for our group.

We started the first night with AC, CM, and SE, and each time I got the PvP reward track unlocked message on the right (because I hadn’t done story modes since long before the reward tracks were added)

I went to select and use the AC reward track the following week, and it is locked again.
I know, am 100% sure, I unlocked all 3 tracks that night, and I specifically remember unlocking AC because I’d seen it available on my reward track list earlier that week and thinking I must have done AC story and forgotten, only to be surprised by the unlock message. (I’d forgotten about the unlock rotation, as I was away for a while and don’t PvP a ton)

CM and SE appear to be staying unlocked (I’m not 100% sure because I don’t know the rotations, so they could possibly relock again)

But AC is locked again after I unlocked it by doing AC story while it was available on its rotation, of that I am 100% sure.
And I’m not terribly interested in running story again when there’s no way to be sure it will stay unlocked this time either, so I’m not sure what to do at this point.

Anyone else seeing anything like this? I’m guessing probably not, I imagine most have them all unlocked long before now ( I was being stubborn for a long time, due to unlocks not being retroactive.

Reward track still broken/locked.