Problem with scheduling and durations

Hi all,

I have inherited a program from a colleague which is based on 7day x 12hrs calendar.

When i am adding durations and relationships into the program, they seem to be extending past the dates required.

For example;

 

Activity 1 = 2 days

Activity 2 = 1 day (FS with ACT1) So total is 3 days.

 

However, what actually happens is Activity 1 takes 3 days and Activity 2 takes 2 days but the middle days overlap so i dont get a true picture.

Any help would be appreciated!

 

Kind Regards

 

Mike