You've gotten a lot of good advice in your threads. I'm certain at least a couple people told you to not make any purchases until you do your research, but you did the opposite. Fish keeping can be really easy and enjoyable, or it can be really hard and frustrating. If you are going to continue to make uninformed purchases, then you are going to continue on the hard road and will likely quit the hobby. I think you should draw upon the experience and wisdom of the forum if you want to succeed in the hobby. I hope you don't take this advice negatively, but I've been following your threads and that is my assessment of your situation.
Like I said, fish are usually most active righ after a water change. That could easily be considered abnormally active. Shimmying is not a good sign - hopefully just stress related. If it's stress it should subside.
The fish are fighting because you only have the 2. Both are group oriented fish and both should be in a larger tank ( if I recall correctly you have a 10 gallon).