What worked for me was to decide to start working out first thing in the morning. I started going to bed just a few minutes earlier so I could get up a little earlier. Then I cut down the time I used first thing to have coffee, read news, etc. before getting started on the day. Instead of 30...
This is just my opinion so it's worth about as much as any other from a random person on the interwebs...
Anyway I personally don't think much of supplements beyond a general multi-vitamin. If you're lucky enough to be able to afford to eat well, then you should be able to address your body's...
Same with Day 27,41 and 55. Labeled side-to-side but illustration shows normal lunges
Days 6,20,34 and 48 match description and illustration.
Again this is minor/trivial but my OCD requires me to point it out :)
I guess on the days that are inconsistent I'll just do both types.
It could be done later the same day, but for maximum benefit it is probably best to treat it as another round of sets to be done immediately following part 1. I think workouts or programs designed with a longer break between parts usually specifically say that.
You can also filter the programs and select "addons" which are designed for what you're considering - being done in addition to another "full" program. They're intended to compliment full programs and shouldn't interfere with anything else you're doing. Back and core is an addon and 10 is lite...