I suspect there's an error in the Henchmen spreadsheet though. Aren't the second ability point supposed to be more expensive than the first and the third even more expensive? If you have five ability points in the spreadsheet you can spend them to get five points in an ability. Don't think it is supposed to work that way?
Not sure how things work in the beta but the attribute points work just fine like this in the 1 for 1 system because you can only max out 9 attributes out of 27 so one third. I don't see anything wrong there. With my henchman I only opted for two combat attributes with all the rest going to stuff like loremaster, leadesrship and so on.