I only found one team created by you in the RMT hidden post list, are you sure you made three? The one I found can be seen here. I checked the PokeBase section and found nothing, so unless you posted the other two over a week ago, you only posted one.
Anyway, the reason it was flagged and then hidden was because it lacked EVs. You are more than welcome to post OU teams on the RMT section, you're correct there, but they need the EVs. Also, you only had 3 Pokemon. It's okay if you have one or two Pokemon missing, but having three means that we're building half of your team, which means it's more like "create my team" than "rate my team". It's probably better to include a Pokemon that you think would be useful, and then state you're unsure about it.
If you have any questions about this, leave a comment. I'll help you out in any way I can :)