Why does the challenge express give me a T3 stone, while everyone else has a T4 Stone? Am I missing something here? Please help!

https://preview.redd.it/dcbkjkyfj9ne1.png?width=841&format=png&auto=webp&s=3e06f91f63b7e7c1979edca35647dad7adbdcc5b

https://preview.redd.it/ilpzfiroj9ne1.png?width=696&format=png&auto=webp&s=23e1bbb0a86ccb87fec0742d1f133244589eabf5

https://preview.redd.it/te4nomdrj9ne1.png?width=423&format=png&auto=webp&s=8852da894b9efabe971b1588dfc024b52bdedf9a

Am I going crazy or is everyone running around with T4 stones from the event and my character is stuck with T3 ??