Each asset's balance is the total sum of all addresses controlled by your wallet - which includes receiving and change addresses (this number can range depending on how many receiving addresses you have). BTC, BCH, DASH, and LTC each have multiple change addresses that are managed by your KeepKey wallet.
A 'change address' is an address that the change for a leftover transaction output is sent back to. Change addresses can get very confusing, but it's much simpler to compare Bitcoin transactions to regular everyday cash transactions.
If you want to pay someone $12, and you have a $5 bill and a $10 bill, you'd have to give both bills to the cashier, and they'd give you the $3 change back. Hence the name 'change address' - you receive change back on a new address!
UTXO transactions work slightly different, the 'change' you get back is actually from the transaction inputs ($5 and $10 bills) being combined together - then split back apart again. The first output, $12, goes to the payee and then the change, $3, automatically goes to your change address. Imagine $5 bill and $10 bill being fused together to make a $15 bill, then ripping off a small piece to get the $3 change for yourself - then giving the $12 with the $3 rip removed back to the cashier.
NOTE: The change address will show up in the blockchain, but not in the KeepKey client's transaction log.