There's no easy answer to your question, IMHO, because the thing you're quoting is badly thought-out and written (which is, of course, the norm these days). Btw, "there newr tiltles"? What should that be? :) Anyway, your question is "When the sentence is future tense, "in the last three months" refers to "in the next three months."". My answer is "no". "In the last three months" is always relative to "now". Unless you're very skilled, you can't just mess with what "now" is and expect "in the last three months" to somehow magically parse into something else. You don't provide enough context for me to be authoritative here, but I suspect that the content that you quote should have said "the three months prior."