We had an intern that was using Flexi to create stock feather flags. He was using Flexi's stroke tool to create outlines. Since it was for print, it wasn't something we ever noticed. One day I used his station to create a banner and couldn't figure out why all my text had large red outlines. They wouldn't show up as something we could cut or edit. So, I asked him to show me how he created outlines, that's when he showed me the Stroke Editor. Went back to my file and sure enough, it was a big red stroke on my text. A few days later we had a file pop up with a thin lime green line around some shapes. Somehow after working in that file, if I created a new shape it'd have that same green line.
So what I've discovered in the past is that Flexi will save the last settings for the tools you used, IF you setup that tool box before actually using it. Sometimes this will translate into creating a new path or text that has the same color, font, size as something that was worked on before. Hard to explain, but that's is how I figured out how to fix it.