Some teams, the Red Sox included are delaying the delivery/reissuing of the tickets until the day of the game. As long as you can see that in your account on StubHub and/or the MLB Ballpark app, you're good to go.
Stay on top of this until you have your tickets! I was burned by waiting until the day of my event and was not able to get in to an event me and five others traveled for. This was opening day so there were not other tickets to replace the ones i purchased weeks prior. Good luck