i have half of an object when the copy is reflected/mirrored it needs to match up in three separate spots down the middle.
ive tried compound path but that doesnt merge them into one line it leaves the gap between them
i cant join them as they are invailed
i dont really want to delete the lines and try to do it in one go as i cant get the curve to be exactly the same on both sides
As I (mis)understand it, the three Anchor Points are misaligned.
Smart Guides are your friends.
1) Create a vertical path (possibly by dragging with the Line Tool and maybe extending afterwards) through the outermost Anchor Point(s)
2) Move the misaligned Anchor Point(s) horizontally to snap to the vertical line,
3) Delete the vertical line,
and then reflect.
It should be possible to direct select the two anchors you want to join and then go to Object > Path > Join.
But you must make sure that there are no compounds anywhere and the objects should not be grouped together.
If you still have trouble, check whether what look like single anchor points are in fact single. You may possibly have coinciding anchors at the path ends.