The leg issues can be normal. Give her a few days and it will firm up. Usually when we have large litters one or 2 will have it. If she is having a hard time getting around you might need to splint it.
Thank goodness! I was so excited to read this post this morning! I squealed a little bit here at work! I am so glad for twins and so relieved for mama (and you). I'm sure you both will sleep sooo much better now. Both doelings look healthy - if not just a little irritated to be out in the cold now - haha. Very happy for you!