The glyph markets are very very sketchy. I tend to have 4-5 posting sessions a day. i.e. i'll log to my bank alt at 5 random times during the day and post 1 of every single glyph @ 1c undecut. Then i'll log to him again in 1-2 hours and post 1 of every glyph again. I don't both canceling as generally it takes too long and you'll be getting undercut anyway. I post in this method and am just happy with the 5-10% of my glyphs that actually do sell. the profit margins on glyphs are huge so even if you're selling just a few, it's a good money maker.