As DW says, it's a bit confusing unless it signifies the big 3 performed 3 times a week
If you feel as if your sessions are too long, you have 3 simple options:
1 - Drop the sets to accommodate a 60-75 minute cut off
2 - Do the program as written but cut rest between sets. In the Increasing Strength thread, Fazc outlined his plan to time each set so he is in and out in a specified time. This is something you could do. As you are doing large amounts of volume, it would necessitate dropping the weight you are currently using as 8x6 and 7x5 on anything is brutal!
3 - Only do one main 8 set exercise a day and increase the number of days you are at the gym. This may not be practicable I understand if you are busy and simply can't spare the time to be in there 4-5 days a week.