Are they active Tickets or active ticket media? When you have old ticket media, like an old Key to the World card, the RF in them can still access your MDE account, meaning you could use it to access any current tickets, etc. on your MDE (just like previously used Magic Bands). You can deactivate these older media if you want to I think.
Expired/used tickets still appear as "active" on MDE, don't know why.