So I guess the first "to" isn't part of the anagram.

Depends what you are calling the "first 'to'"
the anagram phrase commences, "to blotto" and continues to, and includes, "aftermath."

If you have time and patience, copy it across to a word document, then type in Tom Wait's dictum, then cut and paste each letter from the original onto the line under it, in the correct order.

Or you can be like the constipated mathematician ... [evil]