The concurrency is broken because A2 and E90 miss the A2_Kip wp of EO2. I think that this point should be the starting point of A2 instead of the border itself because you can legally leave the motorway there at an at-grade intersection.
Bulgarian A4 is similar and it ends at that intersection in front of the Turkish border.
Edit: It seems that the Bulgarian situation was similar but it has changed since the bgri route is not connected to the motorway anymore and the current HB situation might be wrong now and should be changed?