Hi Kathy,
Thanks for reaching out!
The stock actually needs to be adjusted manually after a ticket has been refunded or cancelled. We have a guide here with some more information on how to do this. I understand it seems like something that would (or should) happen automatically, but there are certain cases in which users may not want the stock to be automatically increased when an attendee is deleted, which is why it was implemented this way.
It would be possible to have the stock automatically adjust, but it would require a customization. I would recommend taking a look at our themer’s guide if you’d like to give it a shot, or we have a list of recommended developers as well if you’d like to get help with the code.
If this is something you would like to see added as a feature in the future, could you please let us know over in our Feature Ideas Forum? This is what we use to gauge user interest in new features and help guide future development efforts.
I’m sorry I don’t have a better answer for you here, but I hope this helps – please let me know if you have any questions!
Thanks,
Jennifer