Please do not use blockchain.info (or other blockchain explorers) to try to understand your wallet. They aren't operating your wallet, and they don't know what your wallet is doing. They try to guess, but they frequently guess incorrectly. Using a blockchain explorer run by a third party company to try to track the balance in your wallet is only going to lead to confusion on your part.
i sent 0.0022 BTC to the address: 1NQnBRwQj7zh2e51MSZQoyhvphyAYrMdVb from 14D7ZgS8D5Z86QHEbrc5xQjg1Rk1xGkTaV
No, you did not. Bitcoins aren't sent "from" addresses. Addresses are used for receiving bitcoins, not sending them. You sent 0.0022 BTC
from your wallet. A wallet tracks and controls multiple addresses. Depending on the wallet that you are using, it may not even tell you about all the addresses that it uses for internal processes.
but then by itself 0.00723515 BTC went to 1Hm1wLW9HWomyFXw8J7fHYgvfCXc8Xe617
This is referred to as "change".
If you go to a store with a $20 bill and pay for something that costs $10, you can't rip the bill in half to pay for it. Instead you give the store the entire $20 bill, and they give you back a $10 bill as change which you put back into your wallet.
When you spend bitcoins, you spend previously received unspent outputs. If an unspent output is going to be spent, it must be spent in it's entirety. You can't "rip it in half". Therefore, your wallet spends the entire output, and then sends a new output with your change back into your wallet at a new address.
In this particular transaction you spent a 0.00944119 BTC output that you received approximately 3 hours earlier. You paid a 0.00000604 BTC, and received 0.00723515 BTC back in "change".
and now i only have 0.0004 BTC in my original address which I sent from: 14D7ZgS8D5Z86QHEbrc5xQjg1Rk1xGkTaV
Satoshi explained in his whitepaper that you should use a new address for EVERY TRANSACTION that you receive. You should think of an address as an invoice number or a payment number, and not as an account number. If you were using bitcoin the way Satoshi recommended (and the way that gives you more security and more financial privacy), then you wouldn't have anything left at the 14D7ZgS8D5Z86QHEbrc5xQjg1Rk1xGkTaV address at all, since it only would have had one output to start with and that output would be spent. Instead your entire balance would be held in other addresses in your wallet.
Since you have chosen to reuse the 14D7ZgS8D5Z86QHEbrc5xQjg1Rk1xGkTaV for multiple transactions, you still have associated with that address a 0.0004 BTC unspent transaction output that was received approximately 1 minute prior to the 0.00944119 BTC.
So i'm wondering did I actually just lose those coins or not because my bitcoin QT still says that I have 0.00763515 BTC Left in my wallet.
Your wallet is telling you that you still have bitcoins in your wallet. Why don't you believe it?