Entity Framework model editor association lines incorrectly displayed

I often end up with the associations lines in my .edmx model editor being "messed up".

Normaly, my relations end are directly on the entities, but sometimes when I re-open my .edmx file, most of them are a couple of p开发者_如何学Cixels off (like 25).

It's not really a problem, but I'm wondering if anyone has a trick to fix this.

Thanks!

The trick is moving with single entity and everything will fix by itself.