Biosca Fujitsu and I found a solution. Atleast it worked for me.
You login on your GW1 account. Go to the hall of monuments and you speak to the historian. He is immediatly to your right. Then you choose the first option ( when you updated your HoM) Then you log out and go to GW2 and go to your achievement panel and then to HoM in the achievement panel. It should show that your statistics are updated. If not, then we don’t know.
I hope it helps!