I believe your hashrate and difficulty is well configured automatically. It can go up and down but it doesn't affect your earnings.
Maybe try  JayDDec's cpuminer
https://github.com/JayDDee/cpuminer-opt
https://bt.irlbtc.com/view/1326803.0

Or Wolf's CPU miner
https://github.com/wolf9466/cpuminer-multi
Wolf's cpu multi miner : https://mega.nz/#!F4ZlRRZT!T5RoiaAMxOVHiUFX0yKq54-jZJ0Kqe9PZGZfbIrqYvM
Non-AES cpu miner : https://mega.nz/#!ssIQXIJJ!nJU6BYMZCezT7qvLcU1Cu3MRwZoSyoBpjjb0E90hnz0


I heard that JayDDee's miner performs better.


Email notification had some problem recently time to time. I believe it's all fixed now.
Please tell me if you still have problem receiving worker alarms.

Email notifications are not working properly. I got notification today that yesterday my worker stopped. And that is only one notification I ever got.
Now I had 2 workers down, did not know they are offline until I logged in to pool and saw.

I will try CPU miners in next day or two. Thanks!
Will try to redirect every resource to MPH, keep in touch. I may ask friends to come to pool also.

current time (or time of last seen) needed on the MPH (on dashboard, for example)

What do you mean "current time"?
The real world server time? Pool shows all time in UTC. (+0 timezone)

What do you mean "time of last seen"?
You mean the last share submitted time for each workers?
This is planned to be added.

You know the server isn't set to a time zone, right? UTC is +-0.