If you are member of more than one subscription, you can choose which subscription you want to work in at any time.
For example, if you are responding to a story, make sure you are responding from the subscription you expect.
To change your active subscription, open the drawer using the green menu icon. Then open the "change subscription" drop-down menu near the top of the drawer:
Select the subscription you want to work in.
If you can't see a "change subscription" drop-down, then you are currently a member of only one subscription.
To see all your subscriptions, including any which have expired, go to your subscriptions page.