If you've decided to start mining LTC because of the latest news about segwit adoption it appears that wemineltc.com has not upgraded thier software to the latest version yet. As such you might want to consider a pool that has. If you take a look at
www.litecoinpool.org they currently allow users to select yes to segwit and any blocks you find will support the latest version.
On a side note litecoinpool actually pays 103 percent of the value of litecoin your hashrate would normally earn you. This is accomplished because they merge mine multiple other coins. These other coins are sold, LTC purchased and given to members of the pool. That extra three percent is a very nice bonus.