I try to understand Microsoft OneDrive

I have 2 Gigs of data on my computer, which i also can see, when i check the OneDrive icon in the notification area. But if i login into the web interface of OneDrive, i can't see the files. Only about 1 MB is used. Isn't the page supposed to show the same information? The synchronisation settings look alright here, & syncing all done since a long time. What might be the problem here? Do i have actually two accounts, using the same email address?

Sounds like you might be logged into a different account.

Yes, indeed. I have managed to login to the correct site now, thanks. The other one was that one, which i had in my browser (through URL completion), maybe from older days. which also seems to work.