I'm using Fontlab 7 (18.104.22.16849) on Windows to create a Thai font. I created 3 glyphs with several anchors named as follows.
After I generated mark and mkmk features using the auto features by Fontlab, here is the result when I combined those 3 glyphs (in order from left to right of the image above) together and turned the mark and mkmk features on. It seems that top anchor is attached to bottom.
What I expect is the following.
And I also expect it to be able to do the following.
What was wrong here? What should I do to achieve the expected result?
I'm fairly new to type design. Thank you in advance for your reply.