What bitcoin testnet explorer do you use?
I used to use
https://www.blocktrail.com/tBTCI like the interface but I saw today sometimes the information is not up to date.
An alternative is
https://tbtc.blockr.ioInformation seems to be up to date.
Some information is not shown eg. block relay time.
There is no javascript checking constantly for new information, you have to reload the page.