Problem solved BUT...it seems like there is a bug - I’ll go ahead and post the bug
When you have two websites and you want to set a minimum order amount on one value but not the other it won’t work. This was causing the purchase order not to show up.
I had default set to $200 minimum on purchase order in system > configuration
I had our retail website set to $0
I had our wholesale websiet set to $200
For some reason it was pulling the $200 value for purchase order when ordering in the backend so that was why it wasn’t showing up.
I’ve set default to zero and wholesale still at $200. This now shows purchase order in admin orders (but it shouldn’t show it for wholesale until the order is over $200 but it does because it is pulling the wrong value which is the one from default)