currently its floating around -71/-72 and they are on 50ft apart.
That's extremely punk at 50'. Something is wrong.
Sorry for the basic question, but what antenna do you have attached and are you sure it's rated for the frequency you chose?
A couple years ago, I asked MikroTik a relevant question; they responded:
Metal 2 comes with 2.4ghz antenna and Metal 52 has dual band antenna that supports both 2.4 and 5 ghz.
Now, these antennas happen to look identical. If you mixed them up in inventory... or if they happened to enclose the wrong one in the box... you would see behavior like this.
If you have any other 5GHz omnis in stock, try replacing them and see if the numbers improve drastically.
One other comment: the Metal line is particularly inefficient for all but special purposes because it is a single-pol device. You will not get the bandwidth or the distance you will with a dual-pol device such as the wAP or OmniTIK.
Also, as you have probably determined by now, you can't run the wireless at both frequency bands at once, which you may be trying to do if you are trying to emulate an Audience. if I were looking to do this, I would start with back-to-back wAPs, which come in both frequencies.