Alicia,
I just saw this and am so sorry. Especially after everything else that has gone on. Normally I would offer to temporarily take some of your prized sps, but I don't think that is the best solution.
I have had this happen twice and one was a severe swing a couple of years back. From experience, I will say that you are likely correct in having a prolonged influence of this to some of your coral. However, I think that you may come out better than you think. Thank god you did not over-compensate for this swing. It has been my experience that corals can handle pretty big changes in their environment, as long as it is only 1 change! Quite often the largest negative effects to sps from an alk swing is the immediate big swing back down. Let things change back to normalcy slowly and don't be surprised if everything looks fine for quite awhile. It could be several months before you get the measure of the incident. If you manage everything carefully and allow no other shifts of parms, you may not have widespread problems. Keeping my fingers crossed for you.
Good luck and let me know if there is anything I can do to help.