The same thought crossed my mind as I read your 1st respsonse about verifying directly with the server records. If you are able to do that, then why not go one step further and eliminate us having to publish/upload to myfxbook? This will eliminate any attempt by anyone to publish incorrect/misleading trading records as discovered quite by chance by Stephanus, although based on your explanation the maximum time such records will be up would be for 6hrs between direct server verification.
From a technical point of view, maybe you are not already doing this due to bandwidth/load constraints etc... and the broker probably wouldn't want you to be hogging their servers/bandwidth etc either.
What you can do is this though :
Similar to the 'Last Updated' time (ie: xx mins ago) in the stats, you can have another one directly below that which says 'Last Verified' time (ie: xx mins ago) as well, although you have indicated a timestamp of the last verification at the top... this seems to be your server-time.
The reason I use myfxbook despite other free services which provide more analytical stats, is because of myfxbook's authenticity in verifying trading records independently, which give potential managed-account clients a boost in confidence. So in my opinion, you should do whatever is needed to ensure that this independent verification process is rock solid and fool-proof.