It was weird, but at least they've finally managed to field a team. I was worried they'd go the whole thing without a line-up, which would have sucked! The only real weirdness was them picking DEFS and Kickers, which aren't all too important and have since been released to free agency anyway, so no biggie.
My guess is they joined thinking it would be a bit of fun, didn't understand how NFL/Fantasy NFL works, started arranging an autodraft order (then got bored or didn't understand how to do it), and then when it came time to actually select a line-up (post-draft), realised their mistake and had to pick up free agents. It's the only logical conclusion really. It doesn't look like foul play, because they only really disadvantaged themselves.