MLM--I think yours is being caused because you have an extra RWG column inserted after your Style column. I think those value maybe should go into the WGR column and then the RWG column can be deleted. I know there was some confusion in the documentation at some point of RWG vs WGR but they are both acronyms for the same function.

L4Lab--I think yours is coming from having a comment column placed before the block and trial columns rather than after. See the standard priming sample in the applications sample folder for a relevant example.