I was facing this an issue like,
If a cad file contain multiple reference block whose insertion point is far away from the block location (for example 100 or 1000 m). then i was importing this cad file through origin to origin then will show an popup message showing , can’t be imported origin to origin but can be imported as center to center. so it wont overlay with other drawing because all other drawing are imported with origin to origin.
my solution: try to delete all the unnecessary data or copy selected data & paste in new file and check whether it is placing at the correct location or not,
if not, then change the reference point of the block which i want and again import the file.