If you see the correct hashrate on your pool dashboard, e.g. pool.bitcoin.com shows a scoring hash rate near 14 TH/s, then you are fine. The general consensus regarding discarded shares is that it's a useless stat.
As I understand it:
- Elapsed: how much time has passed since you have started hashing to pool. It's slightly shorted than the Uptime shown on the System Overview page, which includes boot time
- Utility is the hashrate of your miner times the luck you have had thus far. Over time, luck stabilizes to near 100%. Your utility is close to your hashrate so your miner has had typical luck.
- Work utility is the typical definition of utility as in cgminer. You should have approximately 1 work utility per 72 megahashes. This means that 209k is a good work utility for a 14 TH/s miner
- Your best share is the share that has met the highest difficulty so far. Shares that meet higher difficulties are better. Bitcoin's current difficulty is around 4 trillion right now. If you found a share that exceeded this difficulty you (or your pool) would submit the proof of work and claim the block reward. Pools generally decrease your difficulty (check #DiffA) so that you will find more shares. If your shares exceed the desired difficulty, then you are rewarded, otherwise not. So although higher shares are better, the difficulty check is on a pass/fail basis.
Also, decreasing difficulty does not give you an advantage. Finding twice as many shares at half the difficulty nets you the same reward. Also, if your first pool is alive, you will not mine to your secondary or tertiary pool choices. They are only backups, they do not relate to your discarded shares. I would recommend leaving them blank if you really only want to mine to one pool.
Your time elapsed was only 36 minutes even though you did mention you mined for some hours, it is very possible that the bitcoin.com pool did not find a block during this time and thus you were not rewarded for your shares thus far. You can always check the bitcoin cash blockchain to see recent blocks and who they were mined by if the proof of work was submitted by known pools.
In the main page (system overview) you can see the file system version, which is the date of your firmware. I assume you probably have the autotune firmware from November 2017. It is not necessary to change your firmware if you are not having problems with your miner.
TL;DR You are paid based on the scoring hash rate, determined by your pool. If you are happy with the hashrate shown in your pool dashboard, you should not be concerned greatly with the miner's stats.
