Not sure what is up with this but seems bugged.
It seems before the extra patch fixes that guilds got listed in the positions based on timing as expected but after that it was broken.
My guild did a number of these and absolutely destroyed the records on the island we did.
Yet it has not updated us into any position let alone first and they are marked in grey as already recieved rewards.
Afaik we have not got any rewards (was kinda assuming would be on weekly mtce).
But mainly concerned we spent the time to do this with no recognition for recruiting or rewards to help the guild grow.