You might be able to work on the high side wing saddle to bring it in parallel with the horizontal stab/elevator. If it's more then a few degree's off you'll notice it when ever you do a loop or pull the airplane into a vertical maneuver. Especially when at full speed. But majortom-RCU is right, this is not critical but noticable. If you feel the need it's not too difficult to cut through the joint and attempt to re-align. When building from a kit and starting to put the big pieces on I will always mount my wing and horizontal stab to check to see how things align before glue things perminant like. Having this practice has saved my butt a time or two. A little shim stock and 5 minute epoxy works wonders

Cheers,