If you then do the search as indicated above for the children of the William Jamieson and Elizabeth Collie,  and enter 20 years =/-  of 1785 - 'all counties' in Scotland, you come up with 11 entries - have put them in order.  All Banchory Devenick, Kincardine, Scotland 
1. JEAN JAMIESON Christening: 25 JUL 1774 
2. JEAN JAMIESON Christening: 14 AUG 1774 
3. MARGARET JAMIESON Christening: 26 FEB 1773  
4. ELISABETH JAMIESON Christening: 24 JUN 1777 
5.  Elizabeth Jamieson  Christening: 29 JUN 1777   
6. JANNET JAMIESON  Christening: 23 MAY 1779  
7. ISABEL JAMIESON  Christening: 02 SEP 1781 
8. CHRISTIAN JAMIESON Christening: 30 NOV 1783  
9. JOHN JAMIESON  Christening: 30 DEC 1786  
10. ANNE JAMIESON Christening: 01 MAR 1789 
11. WILLIAM JAMIESON Christening: 03 APR 1791  
The above are a mixture of 'extracted' and 'submitted' entires - that's why the doubles and variance of dates for the same person.   Johns is an 'extracted, record
Regards,   Steve