"that quilt" at Sentimental Stitches is not Jane Stickle's quilt. it's a similar quilt made during the depression.
"Dear Jane" is a registered trademark serving as an umbrella over a number of copyrighted and or licensed products related to reproduction of the Jane Stickle quilt.
if you look at the Stickle quilt, draw your own renditions of the blocks and write your own instructions you are not doing anything different to the art student replicating a DaVinci.
if you start with a photgraph from a copyright protected book or other medim related to the Stickle quilt for example (the legally protected product is the root and source of your work) and then try to claim any resulting products as your own i would not want to be your lawyer. too "iffy" for me.
the Dear Jane software is the only computer program i know of that generates printable patterns for Stickle quilt blocks. therefore, we should not share printouts with each other that came from that software. we should not share photocopied block diagrams from any source.
this is not a complicated issue. if you want to share, then make sure you base your work on a block or quilt in the public domain. draw the diagrams yourself from scratch. write the instructions yourself, in your own words, from scratch. take your own photos of your own work, from scratch. otherwise, either recommend a source for others to buy them or a place they can find legal resources for free.