Outlook 2007 calendar not printing appointments correctly

[imiddleton25]

I have attached screen shot of the problem

we have 15 minute appointments that used to line up accross the day one under the other now for some reason they look like this

 

We set up a whole term using reoccurance and it was fine till end of september then it changed to this

 

anyone seen this and have an idea why. none of appointments overlap

 

they are 9.00- 9.15, 9.15-9.30 and 9.30-9.45