Unsure if there is something else going on, but there are several plays that have duplicate entries in the exported plays.xml file from a fresh league. It seems that these have different action slots assignments as well.

ProSet,QB Dive
D34Under,34U Cover3
D335Soft, 335S Man Hooks
D43, 43B Cover1 Man

Thanks, I don't think it's an issue but I tweaked the names just in case.