I had a log like that and made 3 bows great from it, the wood was particularly tight grained and dark, but you don't get owt for nowt.
I got 2 ELBs from the tight end of mine but each had weird grain going on, and one from the other end.
I sawed off the coarse end first and then sawed the remainder the same way as you have.
No good worrying about how you cut it, and it depends how big it was and a load of other factors,
I don't think there is really such a thing as 'wrong' .. just call it 'non ideal'
there are often so many ways to get so many different bows from any one bit log. Someimes there is just one bow in there, and that's the fun of it.
I hate the term 'expert' but if you have to use it I define it as the man who can put right his own mistakes! ('Cos we all make 'em)
Just go with the flow. Yew is great stuff but you have to work with what you have.
Let it season and then just make the best bow you can from it. Yew can accomodate some grain run off and weird stuff, you just have to let it do it's funky thing and tease the bow out of it
Del
PS Have a look at my website, theres a pic of across section of log just like that on the Yew Longbows page. Google 'Delsbows' to find it.
My Bowyers Diary shows the build along of all my Yew bows warts and all
http://bowyersdiary.blogspot.co.uk/2011/01/recalcitrant-yew.htmlThe above link shows some pics where you can see the grain running off centre along the belly of the bow and there are even some cracks! Look at the next few posts and you'll see it turns into one of the prettiest bows you'll see.