There is actually a history of lineup submissions for each week. It is under Reports - Lineup Changes. I have confirmed the previous two issues to be submitted by the owner.

Therefore, double check your lineups this morning AFTER you submit your weekly lineup. 

I am looking for some RB insurance or TE upgrade if anyone is wanting to move anything in the next couple hours.

I have young WR's/Mike Evans and draft picks available. 

I can not tell you what is going on. The most likely issue is typically user error. Be sure you are hitting SET LINEUP after you make your changes to save them. I know some places once you swap them it automatically saves them. Here you have to set the lineup to save it. Obviously go back in to your matchup and double check your lineup after you have made your changes. 

Also, the trade deadline is for 12:00 PM Sunday. If you plan to make any deals, they need to be competed by then. 

Best of luck the remainder of the way!

Same thing happened to me with Nabers, thank god it wouldnt have matter but, its concerning.

 
It wouldn't have mattered but, there is no freaken way I started Jaxon Dart as my QB this week. I think Chad is going in and changing my lineup. Strange things going on in the league office. There is no way I did that... Wow, I apoligize guys, I'm ashamed of myself... Sports Card Business has me too distracted this year...