AFAIK, the plugin only works if all tiles are the same size (i.e. using a map made in Ace for MV). My issue was coming from using Ace tiles in the same map as MV tiles (I want to use tilesets from the Rural Farm pack in my regular MV maps). As far as the sprite issue, there was a video on RPGMakerWeb's youtube channel about it. I'm not sure which one, but I've only finished the first four episodes. (Each episode is 3-5 videos long, so it might be hard to find quickly.)
Since I'm getting so busy (the fact that I'm often here is due to the fact that this is my procrastination #1 destination), I'm trying a new system where everyday I dedicate 30 minutes to my personal game project. That way it won't fall into the abyss.