Cummins low power and boost

[Toolatenow]

Please forgive my lack of knowledge, what is MM-2?
Also it's a 2013 isx15 with almost 800,00miles on it but runs(ran) like a dream before tune other than having to force regen everyday.
Told the guy earlier that I would be picking it up from his shop in the morning and taking it somewhere else but he let me know to relax cause he went in and changed "alot" of calibrations and it should be good now...