I see the "About" contains 1 Nov 1615
The value stored (seem to be a result of a merges & data conflict resolution) is 8 Sep 1616.
Where do you see the 16 Jan 1617 value?
More importantly, is there a better source than that cited in the "About" for the correctness of the birth date?
Once the correct value is determined (and reference in the Source tab), a Curator can lock that field to preserve the value against inadvertent changes happening with future merges.
Tagging Erica Howton
Actually I need to correct myself on above. The overview WAS referring to the accepted "authority" for this time and place - Donald Lines Jacobus.
To answer your baptism date question I see from this well referenced tree: http://marypie.net/getperson.php?personID=I1837&tree=mm
Baptism - 14 Jan 1617/18 - St. James Parish Church, Colchester, Essex, ENGLAND
As Geni fields cannot show this date change event, I'll reference it in the "about" and go with a date of 14 Jan 1617 in the field.
I've used my ancestry.com subscription to see if I could locate an image of the baptism register, but unfortunately it does not seem to be available there - anyone else with a World Wide Subscription is welcome to double check me.
There are "timeline" entries to clean up on the MP. I'll be doing that next.
Many thanks for the query.