Offseting or Offsetting: How To spell?
The word Offseting is misspelled against Offsetting, which is present continuous of "Offset"
Offsetting has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings offse & ing which should not be misspelled with single 'T'
Wrong Spelling:  offse-t-ing  Correct Spelling:  offse-tt-ing 
Find more wrongly spelled words of Offsetting to spell it well.