rescue dog help! dependency issues?

My husband and I adopted a poodle/maltese mix, and we've had her for 2 weeks now. She started of super timid and scared, but has warmed up to us both relatively. Not sure if we're dealing with some separation anxiety here, but she will follow me everywhere. If she's laying down and I get up, she jumps up to follow. She will whine if I leave my husband and her in a room, staring at the door. He says she eventually quiets down, but pretty much just stares at the door, making little sounds every now and then. When he leaves the room and she's completely alone, she'll whine a little and eventually settle down and just lay down by the door.

He has been the one doing most of the walking, (positive, basic OB) training, treating, feeding, but it hasn't seemed to help with her attachment issues to me. The funny thing is, she will obey basic commands (sit, come, place, stay) from him, but not as well when I am the one giving commands. When we are all together in a room, she is super happy and will want to play. What can I do to help strengthen their bond and her comfortability with him? Why does she seem to love me but won't listen to me?