Hasta La Motion!

Iam having a weird problem with the animation curves in AE. I’ve never come across such a problem with curves before, and iam not sure how to explain it. However I have a screen of it to explain it even further.

The problem is when I set keys for example for the position of an object on 3 (or more) different places on the timeline all the keys in between the start and the end key have splitted(tow) points on the curve. Iam hoping for some answers to solve this, I had no luck searching the web.

thx in advance,