Maurice and Gloria Deriemacker's grandchildren

If anyone knows of a mistake or an oversight, please let me know.
1. Debbie  4/11/1963
2. Christine 5/5/1964
3. Tammy 8/29/1964
4. Richard 3/9/1965
5. Robbie 3/17/1965
6. Tina    2/23/1966
7. Theresa 5/3/1966
8. Stevie 5/27/1968
9. Dan 4/10/1969
10. Patrick 7/12/1969
11. Jacob 12/17/1970
12. Alison 7/21/1970
13. Derek 12/28/?
14. David 3/23/1976
15. Janeen 3/23/1976
16. Luc 4/28/1976
17. Darryl 5/24/1977
18. Dustin 6/26/1980
19. Isaac 4/6/1980
20. Chris 3/12/1983
21. Ashley 10/15/1984
22. Matthew 11/16/1984
23. Andy 3/27/1986
24. Max 5/16/1986
25. Katherine 1/11/1987
26. Nancy 9/30/1987
27. Brian 5/5/1988
28. Emma 10/26/1988
29. Susan 3/3/1992