I think it's funny you make it sound like it's a problem. In the Netherlands we think it's really useful to play different positions, so you understand the game better and other roles. Are more versatile for tactical changes etc. Just take a look at Blind for example. He's now a DM, but used to play until last year at the LB position.
No. I didn't mean in that way. I said I was not sure whether he is a CB or a DM as he looks good in both positions.