See I don't think that's some huge plot hole...Talia and Bane is league of shadows just like he is

...them being able to infiltrate Wayne enterprises,find out his identity,and her being able to slip under his nose ain't some off the wall shyt to me...they have all the attributes he has and maybe more which is what made Bane so dope,he wuznt just a musclebound goon like I expected.
More importantly as I mentioned the last post,maybe Batman who is focused and motivated they don't get the drop on em and he covers his tracks better....just like Cat Woman maybe is not able to rob him...her robbing him sumwhat gives him a small spark...but he's still rusty
That's the whole point of the movie is that he's rusty,and that's why he gets beat....and he has to rise out of the pit stronger than he was to win

...by the time he was refocused it was too damn late to do a background search on her