If I remember good it shows the last experience entered in the career timeline. So if you want to appear as MB this should be the last experience entered in your timeline. If your last experience is filled with TM position, then you'll be showed as TM
Go to your profile, click the pencil icon on the data section, and then I guess you’ll be able to edit your position?
If I remember good it shows the last experience entered in the career timeline. So if you want to appear as MB this should be the last experience entered in your timeline. If your last experience is filled with TM position, then you'll be showed as TM