The counter becoming a decimal happened when I first tried the game out in January but the error didn't happen until I tried playing again when I reported it, so I cannot remember too well. The things that I remember were that I was reloading the save if I ever took a step with no events occurring, both before and after the change in the counter... I encountered several enemies, and I probably tried out most of the options available for each of them since it was my first time playing (although I do not think I ever used an attack), as well as doing the same outside of battle... I encountered a minigame event with the reward of a full heal twice, I think it was rock-paper-scissors or a coin flip, but I'm not sure whether that was before and/or after the counter became a decimal... I likely took at least one break, using other windows on my PC while the game was still running, although I do not know if that could have had any effect... and I was in Kiku Village and don't think I ever chose to continue the mission.
Yeah, I'm really unsure what happened there. My only theory is that a wind weather event went off and pushed you back a decimal amount of steps (which shouldn't happen anyway); if not that, I don't know what else could've possibly done this. I'll make the save loading code ensure steps is an integer, but that's really the best I can do as of now.