Terry, according to Sue's directions for February, on page 4 she tells us that the feathered star with the quarter square triangles should measure 21-3/4" (unfinished). Can you square up yours to that measurement? If not, just trim it to be as square as you can get it.
As for the border strips, I'm not sure which ones you are referring to, but Sue gives really good directions to calculate both the length and width of each floater depending on the size your particular quilt turns out to be.
Hope that helps.