Sort:  

It appears that's due to the SortOrder. Here's what the object for STEEM looks like:

"STEEM":{"Id":"20333","Url":"/coins/steem/overview","ImageUrl":"/media/350907/steem.png","Name":"STEEM","CoinName":"Steem","FullName":"Steem (STEEM)","Algorithm":"N/A","ProofType":"Pow","FullyPremined":"1","TotalCoinSupply":"99692126","TotalCoinsMined":"99692126","PreMinedValue":"N/A","TotalCoinsFreeFloat":"N/A","SortOrder":"526"}

You'll see it has a SortOrder of 526, which seems a little high to me. It's likely a little biased, given it's based on:

The order we rank the coin inside our internal system

I could likely run the coinmarketcap API and sort by the true market cap rankings though if people would find that useful.

Coin Marketplace

STEEM 0.04
TRX 0.32
JST 0.098
BTC 64100.66
ETH 1876.75
USDT 1.00
SBD 0.38