Very odd question: why is this wiki entry worded like this?

The last paragraph in particular confuses me. If the Challenger Deep and Deepsea Challenger missions both used manned research submersibles that reached a maximum depth of over 10 thousand meters deep, then how does the Jiaolong, another manned research submersible, break those records at barely 7 thousand? It just seems... objectively wrong? And all of the sources for the Jiaolong paragraph lead to invalid pages now. The wiki page in question is "The Hadal zone" (https://en.wikipedia.org/wiki/Hadal_zone), and the entry is near the bottom of the page. I have no idea where else to ask this, and it's driving me nuts for some reason.