My DD was sitting unaided but was only just taking to solids ( this was my fault because she was having 6 bottles instead of 4 bottles and so was not hungry for food. As soon as I cut down her bottles, she took to solids), so she was having mashed food aswell. Due to this I didn't start with lumpy food untill she was 9 months and for finger food she was 10 or 11 months.

I wouldn't worry. Each child is different and do it when YOU and your DS are ready. Not when the MCHN tells you to.