1) You have extended your working hours. As long as the difference is not too big, it is not fraud. For example, it is normal to work for ten months a year and write for two years; In addition, writing a resume may also shorten working hours. For example, it is normal to work for two months a year and then write for another year.
2) Don't worry that the new unit interviewed will know the last company. You did work in this company. It doesn't matter even if the new unit calls the old unit. Ask at most that you have worked in this company for a period of time, and don't ask too many questions. The questioner is not that stupid, and it's not like the police checking accounts. You should give a chance. Generally speaking, the new unit will not call the original unit at all.
3) If you are interviewing corporate executives, you'd better write your resume accurately for future reference. On the other hand, if you are applying for an executive and you don't have a resume, the new company probably knows about you. )