The game disables saving during cutscenes, and in one case between a couple cutscenes fairly close together. It seems there was a problem during the save process, which has the game thinking it is in a cutscene when that save is loaded. Movement and attacks may also be restricted during cutscenes (I never tried doing either, but it would be a reasonable precaution) which could account for the problems you had with that.
By comparing the problem save to a working save it would be possible to narrow down where the problem occurred, and depending on which file is to blame, it may be possible to fix it. However, with your most recent save only an hour previous, replaying that part of the game would probably be faster.
