Hello everyone, I am having trouble with accuracy on my drawings due to inaccurate object snapping. 

A. Drafting new objects referencing an existing point seems to often draw misaligned off the starting reference point. 

B. Drafting new objects referencing an existing point that has a dimensions line on it will sometimes take the head of the dimension arrow instead of the actual object parameter point. 

The misalignments are by small increments yet as drawing shapes increase, all these inaccurately originated objects mess with dimension accuracy.  Any pointers on rectifying this behaviour?