You might send a PM to the Trackable Owner (or add to your TB log so it doesn't get lost in email), and suggest they switch it to "This is not Collectible". Lots of us like to click checkboxes , so maybe it was an error.
If this is indeed the trackable in question and you are not comfortable in contacting the owner, I can politely contact them on the differences in the settings.
I am happy for you to contact them I am still fairly new to the game and dont want to offend any one just yet lol but will be placing the item in a new cache in the next couple of days so will be on the move soon