I have never had good luck trying to get Post Haste to do anything. I assume you're using the basic version included with Gibbs... as far as I know, it will not support more than one work offset out of the box. Does it post out the program using the same work offset coordinates for every operation as well?
I had a similar problem with Post Haste... the free version does not support rotary motion, and I needed a post. Luckily, Txcncman is a saint and posted this:
Virtual Gibbs Post Needed
It probably won't work for your control without some editing, but it's far superior to messing with Post Haste, in my opinion.
Are you planning to use this machine for more jobs in the future? The cost of a post from Gibbs is not extravagant, and they will work with you to customize it exactly as you want to see it.