I was surprised that the site is still working, I thought they stopped already since the time they said that they were to upgrade, but no timely updates.
Anyway, that's weird that you were able to withdrew a small amount. I saw on reddit
(comment by the head mod) that CoinsMarkets quietly disabled ECA withdrawals. Several users in the chat stated about losing and not able to withdraw their ECA too. Another shady move from that exchange indeed.
You were able to withdraw your ECA since February 26th. However, it appears that after sometime, CoinsMarkets quietly disabled withdrawals and those who didn't do it in time are back to waiting until the re-enable withdrawals again.
The website probably reports you successfully withdrew, but in reality, withdrawals from CoinsMarkets' ECA wallets have been disabled. I'm sorry to have to tell you this bit of news :/