[from Cointrace website]
>Funding is ended by the first issuance transaction.

I think I am missing something.  How is this enforced if you are using standard clients?  What if someone sends a funding transaction to the project address after the issuance transaction?  Is it up to funders to make sure the issuance transaction has not yet occurred before they send a funding transaction?  If so, then there is a race condition here. Funder could be sending a funding transaction at same time as the issuer sends the first issuance transaction.

Maybe it's not an issue.  If additional funds are sent to the project address after the issuance transaction has occurred that's just more 'shares' that can be issued.