I never had any issue yet on using cryptopia before and I think you must add 2FA authentication in your cryptopia account to protect your account from being compromised and always use a unique password to protect your account from other websites or email.
I use Cryptopia to exchange some bounties and to exchange my mining coins because some coins that I mining is only supported on Cryptopia and until now I still using it without any problem.
You are right added 2FA to my guide, thanks.
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Like I said:
"I try to avoid this exchange but some of the coins are listed or have a decent volume only there".
Why? I don't see any reason to avoid using this exchange.
Lucky you but as you can see I had quite a few problems when using this exchange. Of course few of them were my own fault like not checking the coin page and status of cryptocurrencies before use/transfer and many others/additional issues because of Cryptopia fault.
Like I said this guide is for every exchange and I would be happy to read it before my first deposit on Cryptopia.