Lots of new resources have come online since you started this topic in 2009 but I'm still struggling to match the information you posted with any actual RECORDS.
Could we start from scratch please. You've listed some baptisms from Blaris- are you sure these are the correct family? Church of Ireland baptismal registers usually don't list maiden names which is unfortunate. I know it's difficult if records are incomplete or missing but one of the worrying things is that the baptisms imply the family lived in the area for a number of years yet I cannot find birth records for Henry, Samuel or Joseph in Lisburn registration district (or anywhere else in present N.I. counties either).
Back in 2008 kingskerswell wasn't able to find a marriage for John Taylor to Ellen (and her's always been extremely good at locating marriages as well as other information). I have checked GRONI's own index (now online) and there is no John Taylor marriage on 17 July 1877 listed so my next question is- where did you get the date from?
The Belfast family I mentioned was only a possibility from the details you provided and may well turn out to be a different Taylor family so might be best to concentrate on your Taylor details for the moment.
Now for the questions about your grandmother... Sarah Jane Taylor born c1878? where did you get her age and parents' names from? when and where did she go to in Canada? when & where did she marry and die (and under what names)?
Hopefully we will eventually get to the bottom of this mystery