Need a public service announcement: if you or a loved one went to confession with Father Boazman prior to August 17 please return to the confessional to make a valid confession.
I would actually suggest that one needs to follow the advice of the statement and contact the chancery if one has concerns.
If one has, subsequently made a confession to someone other than Father Boazman and one’s only “flaw” was getting the date of one’s last valid confession wrong because of the mix up, and not including sins because one believes that one had been absolved of them by confessing to someone who did not know that he was not a priest, one is actually, according to what I understand to be the traditional application of the teaching of Trent, ok—though it would be worth re-examining anything that you tried to confess to Father Boazman that you happen to recall and for which you would like to receive a penance (and or advice) from a priest.