Actually, I think the easiest way to describe this one is by describing how I reproduced it:
1) I put a bunch of Yellow Crumb Flowers in a SDB in my tower and priced it ridiculously low, at 15 currants each.
2) (Not part of the bug, just optional.) I changed the SDB's style to one I normally don't use, to keep better track of which SDB I used for this bug.
3) I removed all the Yellow Crumb Flowers from the SDB.
4) (Also likely not needed for the bug.) I took the SDB off the wall and put it back in my inventory.
At this point, it looks like as long as I do nothing else with that specific SDB, sites tracking what's being sold in SDBs (see links below) still see me selling all those Yellow Crumb Flowers for 15c in my tower, even though it's no longer there at that price. Obviously, there's an updating problem when the owner empties a SDB.
http://glitchmarket.com/auctions/herbalism_supplies/yellow_crumb_flower/
http://www.glitchremote.com/#HomeStreet:/Yellow+Crumb+Flower/