Seems like a major error in planning. I do not know why you would keep upgrading character's epics to 7.0s if after the first one you found that the 7.0 has one type 22 aug slot.
It is a good idea to allow lower level augs to fit in slot 22.
This was brought up when T7 came out over a year ago (?). It is not that big a deal really. it slows your progression down a little to make that extra NS aug...but a lot of people did it before you, so have faith that it can be done. I waited a good long while, with duel wielding NS classes, until Halloween events to finish the NS because I am too cheap to build everything else up and offhand doesn't strike as much as primary.....just a thought you could try. When I got my first 7.0 (on a pally) I had to go back through and redo the epic because I didn't have the funds at the time to make the FS9.
...it will be ok just take a deep breath and farm on!