PDF wrong import scale/size.

 From:  rhodesy
2555.3 
It's a unit problem I think. If I switch my MOI units down to mm the scale is correct by the fact that it will be a 5 x 10 rectangle not a random figure like 14.1 or whatever it was i can't remember when my moi units were in metres. I have tried checking and unchecking the scale objects on import option but that doesn't seem to do anything. So now i just change the unit back to metres without scaleing and im where i should be. Strange though and not terribly comforting!