What they say till now does not come true, they lie every time. Now the explorer is down, my MNX has more than 12 Confirmations still it is pending on exchange.
When you clicked the button "deposit" in your account you confirmed that you know that the asset, i.e. MNX, is in testing mode and you act on your own risk till official announcement.

The link to follow Livecoin news is
https://www.livecoin.net/en/news/listToo many people sent too many transactions at a time.
It will take more time to confirm.