a charm pack is generally a 5" square of each fabric in a collection- so if you order 4 of the same charm packs you will receive 4 sets of the collection---if you want 4 charm packs all different you need to order 4 different charm collections....sorry you wound up with 4 the same- but it should be a good thing- give you plenty to work with.
making a scrappy one patch quilt can be done many different ways- if you wanted to make it larger than what your charms will make you could choose a good white on white- or even just bleached muslin and use white in each block (or any other color) as the *force* that binds it all together
like cutting a a5" square out of white to go with each of your charms- you could put them together- stitch on each side of the diagonal line- cut apart= press toward the charm square- and put together a scrappy pinwheel= or any other lay out= 1/2 square triangle blocks can be used for many many designs.
adding any (fabric to tie it all together) will make your scrappy work :)