When Strange reveals that Cobblepot is certified sane, he is initially holding the certificate facing himself, then in the reverse shot with Cobblepot centre-frame, the certificate faces Cobblepot before the next shot shows Strange turning the paper to face Cobblepot.
Initially when Bruce shows Matches Malone his gun, he's holding it in his left hand. But when Bruce actually points it at Matches with the intent of killing him, he's holding it in his right hand.
At 02:54- when Selina hands Bruce the revolver it is seen to be unloaded but at 28:19- when Bruce points it at Matches it is loaded.
From the outside of Matches apartment there appears to be another apartment to the immediate left of Matches'. When inside Matches walks to the left and sits at a desk with a window behind him. This couldn't happen if an apartment to the left of his. Even is it is not an apartment at the end of the corridor to the left is the stairs that lead up to Matches apartment also making it impossible for a window to exist the the left of Matches' apartment.