By "packs" do you mean (2) two packages with (6) six tablets each? If so, then you have 27.6mg total. That's a bit more than the largest tablet made (which is 23mg). The 23mg tablet has been recommended for a single 400 gallon treatment.
Your signature indicates you have 45gal tank?? If you are running a 45gal system, then you have roughly 10 times needed for one treatment. I think you're fine running one tab a treatment. (I would add a little shave off of a second tab for good measure), but remember that it's been reported multiple times that the length of application appears to be more crucial than exact amount of Interceptor. Take your time and run the three treatments. And Let us know how it goes.