You've got to wonder what the admin/mods are doing to let over seven hundred reports go "unhandled" especially when reports tend to disappear from the "your reports" list after a month or so.
Were those all 700 reported within a month?
I sort of know when my report is going to get unhandled status - It's mostly posted from reputed members which are borderline trolling/off-topic/harassment or move -> section request that I had reported. The decision of the mods can be argued upon and called sort of biased and are definitely controversial. For example, you can argue if one post belongs in Meta or Reputation and both sections are right depending on the argument presented. Makes it hard for mods to decide and hence, unhandled.
Are they still there?
Yes, you should be able to view them in your report lists no?