Are your IEW Lessons multi-day or single day assignments?
Unfortunately, OLLY is not able to split up multi-day assignments in order to skip over weekends. So if you have a five-day assignment starting on a Thursday, it will extend to the following Wednesday, but it will appear to go over the weekend as well. However, the weekend does not count toward the total number of days.
Hope this makes sense - if not, just let me know more details of what is happening and I'll try to help