RD-BH
Human
Problem:
Aztec vs Greece
Greek Sword moved onto same tile as Greek Hoplite
Aztec Jaguar attacked Greek Hoplite
Aztec Jaguar won, moving onto same tile as Greek Sword
Photo of Greek Sword on same tile as my Aztec Jaguar

I replayed from previous turn then quicksaved [DX9].
Quicksave before Greek Hoplite/Sword stack (just press next turn)
View attachment QuickSave.Civ5Save
Similar problem (from another thread)
Aztec vs Greece
Greek Sword moved onto same tile as Greek Hoplite
Aztec Jaguar attacked Greek Hoplite
Aztec Jaguar won, moving onto same tile as Greek Sword
Photo of Greek Sword on same tile as my Aztec Jaguar

I replayed from previous turn then quicksaved [DX9].
Quicksave before Greek Hoplite/Sword stack (just press next turn)
View attachment QuickSave.Civ5Save
Similar problem (from another thread)
Looks like a bug...
Let A, B and C be 3 consecutive hex tiles in a straight line.
I have 2 scouts: scout01 in Hex A, scout02 in Hex B.
Hex C is occupied by a barbarian brutal.
Now my turn starts:
1. I use scout02 in B to attack the brutal in C
- both units survived the battle
2. with scout02 still occupying B, I attempt to attack the brutal with scout01
- left click to select scout01, then directly right click on the brutal to attack
- scout01 moved into B and stacked with scout02, then stopped moving
3. I tried once again to attack the brutal with scout01, who's in B now
- select scout01 in B then right click on brutal: scout01 gives no response
- scout02 cannot be moved out of B either