Why is the 34 VOR offset?
Yes, you've noticed that the track for Rwy 34 should be 340 (per the RNAV 34 plates) but the VOR 34 letdown is offset at 346.
Logically the DVOR is placed on centreline at either end of the runway but as both 16/34 and 09/27 share the same navaid (114.1), it ended up being placed near the intersection of both runways on the north-east quadrant.
When the PF flies the VOR 34 approach, the aircraft tracks a line (346) which intersects 340 at an angle. As it descends, it will inevitably reach a point when it is directly on the 34 centreline. The altitude/height at this point is exactly 760'/430' which is the mandated MDA/MDH.
It was designed such that if you still cannot see the runway at this point, you must not descend further and you will have to go around. If you can see the runway, you are exactly on centreline and so you continue visually to land with minimal manoeuvring for a stabilised approach.