And another Wilson involved, Robert! My Aberdonian uncle taught me that one!

And yes, bagpipe notation is quite strange if you're used to standard notation, but I guess like anything else ( ABC, tab, standard notation), you can learn it if you try or need to.
And yes, ornamentation does vary with the capabilities and idiosyncrasies of different instruments.
As for bagpipe tuning, highland pipes sound as B flat, as stated above, but you can get different chanters for Lowland pipes, e.g. A and C. While in the Spain a few years back, we met a group of Asturian pipers, amd they played in C.