[ARCHIVED] Orange/Green Exclamation signs over lots / Houses disappear

Actually I finally found the solution after reading a couple of helpful details, apparently it had nothing to do with the "Mods" the entire time. I simply had to D E L E T E the local thumb cache, but only if the unfinished/incomplete symbol appeared, when the lots looked fine before going into build mode. I Repeat, "Delete Local thumb cache" is what i had to do to fix this.