Well, this is an update.
Today I was able to get the notch filter from Channel Plus NF-470 Notch Filter and I placed it between the antenna and the amp. The results were that channels 23 was gone, but the reception from other channels stayed the same. Also I raised the antenna to 30ft up in the air.
Since that did not change anything besides get rid of channel 23, I did try to place it after the amp and now channel 23 was there once again and the reception was the same as far as the other channels.
So far, now I am just waiting on Tin-Lee's attenuator so I can try it as GroundUrMast recommended.
If this does not work, I will sell everything on craigslist and contract directTV once again.
