I've found this problem with TTL, but it seems to be ok in manual. Did you try manual with them?
The strobes worked OK in manual mode. I should have added "TTL" to the title and original post. My intent with this thread was to call attention to the fact that the strobes not designed to sync above 1/200, so that anyone thinking about buying them would have a little more information to work with. It's not information that's readily availble.