That is because you are on mastodon.social as well (on the same instance as @techlore@mastodon.social). You can see that the first Techlore account is, when you click on it, on mastodon.social, too. That is also the reason it lists first in the search results as it is a precise match, only the instance name is hidden.
The hidden instance name is done on many federated applications to distinguish between federated (with the instance name visible) and local (without the instance name) content: accounts, posts etc. @techlore@mastodon.social is therefore local to you, whilst federated for me on mastodon.online. I see there the full name with the instance name visible with your search query.
TL;DR: Try the first account. See if there are recent posts (as in this week, for example). Other accounts are previously used ones, PeerTube accounts etc.