Have either of you made any site changes? Are you continuing to work on SEO such as creating new backlinks, updating your content, using good keywords and keyword phrases, etc.?
I have noticed every couple of months hey yahoo will do a reset and it takes a few days I just hope that yet who continues To provide is valuable information
Haven't you read??? A few months ago yahoo mentioned they will be shutting down siteexplorer. There are other options such as opensiteexplorer you can also use seo for chrome plugin as well.
Yahoo site explorer is going to shut down.As Yahoo Site Explorer (YSE) rolls in to Bing Webmaster Tools the information will be initially restricted to sites you own - so competitor analysis will be lost this way. Though if Bing wants to get more people using their tools instead of Google, the move would be to include competitor data access like YSE showed.
Yahoo Site Explorer has always been rubbish. I have been using ahrefs for a while now, in the beginning it was great, but lately it's not that good anymore.