We have a Sharepoint farm where we have Cont. crawls configured on a content source, however it still seems to run Incrementals every four hours. When we changed over to Cont crawls after recreating the content source (due to another issue with GPO) the 'Schedule' drop down changed automatically to 'every four hours' - I have seen some screenshots where this is greyed out, but it isn't for us.
Everything I have found online suggests it doesn't actually run the incrementals, but I can clearly see from the crawl history that it is, and that items are being processed by it:
Does anyone else have a similar situation, and a possible explanation? I have been combing technet et al for a while now and can't find an official answer from MS (surprise, surprise) and am loathe to log a call with them for it and incur a cost just to do their beta testing for them.