Turn Symbols in Routes

I have set the new release of HomePort to not create symbols for turns in routes. That works fine in Homeport, each turn is a dot. However, when I upload them to my 5208 plotters, this is what I get:





a seemingly random assortment of symbols for turns. Some are little squares (fine with me), some are fish symbols or other miscellaneous symbols.

So - is this a HomePort issue, a plotter issue, or an incompatinility between the two.

More importantly, what is the "fix"?