Receptor or Receiptor: How To spell?

The word Receptor is misspelled against Receiptor, a noun meaning "One who receipts; specifically (Law), one who receipts for property which has been taken by the sheriff."

Word contains consecutive vowels 'EI' in between alphabets rec & ptor is misspelled as 'E' as letter 'I' is phonetically ignore
Wrong Spelling:  rec-e-ptor 
Correct Spelling:  rec-ei-ptor 
Find more incorrect spellings of Receiptor to spell right way.