Ive been on east, and when my hashrate started jumping like this, I switched to the main server. It was fine for a little while, now its happening again.

Can someone explain what is happening with my hashrate for the past day and a half? Everything seems fine on my end, but my hashrate is jumping up and down.
http://www.middlecoin.com/reports/1JXHc8HP3A2bw6suCCJMPd5cM9e2Tap8gL.html

I have two rigs online for rent. Username is relazy. They are 100% stable with 24/7 uptime. Hashrates are accurately listed as given by bfgminer/multiminer.
Please give me feedback, thanks and happy mining!