Strange problem with midi clips.

I have some drum patterns I save for reuse and then drag them in from the browser.

Say I have a 4 bar loop playing, then I drag in a clip and place it right after the currently looping part.

Now every time the looping clip starts over, it plays a bit of the clip that comes right after?

Why is Sonar playing part of a clip that comes after the loop when it never gets to that part?

If I move the clip I just dragged in so it's not right next to the looping part then it doesn't happen.

EDIT:

Spoke too soon, it does happen, it's like Sonar wants to play a bar from the clip that comes after when looping, if I move the preceding clip less than a bar away from my loop section, Sonar plays that bit, if I move the preceding clip more than a bar away then it doesn't happen.

What's funny is that the first clip that's looping, is looping fine before I drag the next midi clip in. Then I drag the new clip so I'm 100% sure it doesn't overlap.

Hit play... The loop plays fine once, then gets to the end, loops over and plays a bar of the next clip, then goes back to normal, gets to the end and the same thing keeps happening.

If I now move the new clip one bar from the looping clip it doesn't happen, if I move it less than a a bar, the portion of the new clip that's not a bar away will play at the start of the loop.

They are not groove clips as I always record a whole section (Verse, bridge, chorus etc..) with the natural variations that creates, I'm a drummer so I don't like static 4 bar loops repeated over and over.

Very very strange.