Mistayed or Misstayed: How To spell?
The word Mistayed is misspelled against Misstayed, an adjective meaning "Having missed stays; -- said of a ship."
Misstayed has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings mi & tayed which should not be misspelled with single 'S'
Wrong Spelling:  mi-s-tayed  Correct Spelling:  mi-ss-tayed 
Find more wrongly spelled words of Misstayed to spell it well.