My hashrate stabilized to correct ghs after the first 6 hours. All looks great.
I do have something for the suggestion box(or I may be doing something wrong) we need some type of cookie or something for the dashboard so I don't have to keep putting my username and password in every time I want to check my stats. I use android only(other than pi's) and made a shortcut like I do with my other pools, but still have to log in ckpool almost every time.
Yeah it's a php session timeout - on the server I've got it at the php/apache default of 24 minutes.
If you access the web page less than 24 minutes between each time, the php session in the browser should still be alive.
I see that happen all the time myself also, but don't think it's a good idea to have it much longer.
I can extend the session time to 1hr if no one has any objections, but I'm not really keen to have it much longer.
No real reason to be so short most polls leave you logged in for 24 hours.