Formula fix (today)-(month/day of hire) for vacation accrual

In the attached worksheet, I'm trying to create a formula in Col D that will give me the difference of (Todays) Month/Date and (Date of Hire). The shaded rows at the end do not provide a correct answer. How do I make the Column formula eliminate the 1 (due to hire mnth/day falling between 1/1 and current mnth/day). I've put about 30 hours in this formula, tried it many different ways. . . and realize I just can't get it.

I'm all for redoing the whole spreadsheet if you have a better way of doing vacation accruals! Hint!
Thanks for looking at this! I hope to hear from any of you, soon!

- Daphne