Dear Werner & Fred,
Thank you both for your help. The reason why the trim data and the original data are different is because I normally use MC 15 together with an addon called Kornucopia which has many additional functions. These in between steps I did not mention in my post. I first regularized the data with a Kornucopia function, this function regularizes (maps) the data to a common "X" increment based on various options defined through the argument of the function. I then trimmed the data again using a Kornucopia function.
The datasets actually represent the different stages of blood clotting going from liquid to stable clot. Unfortunately, depending on your health and some other factors many different profiles can be generated. So I will try out your modifications on more complicated curves. I hope you allow me to come back on this item if I experience new problems.
Unfortunately I cannot merit you both with the correct answer due to limitations of the collaboratory.