Maintenance for the week of October 12:
• PC/Mac: NA and EU megaservers for maintenance – October 12, 6:00AM EDT (10:00 UTC) – 8:00AM EDT (12:00 UTC)
• Xbox One: NA and EU megaservers for maintenance – October 14, 6:00AM EDT (10:00 UTC) – 9:00AM EDT (13:00 UTC)
• PlayStation®4: NA and EU megaservers for maintenance – October 14, 6:00AM EDT (10:00 UTC) – 9:00AM EDT (13:00 UTC)
You can but you can only carry one of the same map. So if you find Treasure Map 1 you need to use it or put it in your bank before you can pick up another Treasure Map 1 again
There is - or was, at least - also some peculiar bug that lets you carry several of the same map in your inventory at once, but I never figured out what triggers it.
That aside, yeah, bounce dem maps;)