The first error (order of columns) has been recently fixed on master, should be in the next release:
https://github.com/JuliaData/DataFrames.jl/pull/1366
Regarding the second one, it’s not clear how it should be supported. FWIW R’s rbind doesn’t allow it, only dplyr::bind_rows does. I guess we could allow this via a keyword argument. Cc: @bkamins