There might have been a slight change affecting midfielder numbers.
After I got an MC sent off in game yesterday I was still legal and once oppo went 3 man strikeforce I went 5 man defence but got penalty - I was sure it was still legal but pushing DC/DMC back to DMC position solved it again..... but I'll need to read through the rules again first to dbl check it wasn't my mistake.
Yeah, I got mixed up remembering what I did. I thought I moved DMC back and one up front into AMC....but it was only the DMC I moved and so I only had 2MCs in midfield and no-one on DM or AM line.