Outback,
As Lak7 and I and several others have stated, don't use DiSEqC 1.2 to position your motor. Use the USALS function, it is much easier.
When using USALS, ensure that your entries for your latitude and longitude coordinates are accurate for your site and entered in the proper lines and that your longitude shows W and not E and your latitude shows N and not S.
Now that you have located 72.0°W, you are in a much better situation. With your motor set to the proper latitude and your site coordinates entered properly and accurately in the USALS menu, you must be very close with your dish elevation and your azimuth positioning of the whole assembly on your mast.
From this point, you should monitor the signal from the TPs on 72.0°W and tweak your dish elevation and entire assembly azimuth aiming.
When you do this "tweaking", you should have a portable TV and your receiver right out at the dish with you so that you can watch the signal quality first hand and directly.
With your Coolsat 6000, you don't want to use the DISH SETTING menu to align your dish and motor. You want to use either the MOTOR SETTING MENU or the MANUAL SCAN MENU to do this. The reason for this is that in the DISH SETTING menu, the receiver only looks at the very first TP listed in the receiver to display the signal level and quality from. This TP may not be the TP that you want to use to align with. Using the MOTOR SETTING or the MANUAL SCAN menus will allow you to scroll through the list of TPs in the receiver's memory so that you can select the TP that you want to monitor. On 72.0°W, use the 12.055 V 6890 SR TP.
Now that you have your portable equipment out at the dish and your receiver set to monitor this satellite and TP, stand behind the dish and grasp the outside edges of the dish with both hands (like a steering wheel). Very gently pull/push the dish just slightly left/right or up/down. Make sure you use very little pressure when doing this, you don't want to move or bend anything, the slightest amount of pressure will tell you what you need to know. Observe the signal quality as you do this. When you see the signal quality increase, note which direction you were moving the dish. Stop and loosen the mounting bolts for that axis and move the dish elevation or the whole assembly's azimuth in that direction just slightly. Move only one axis at a time and then doublecheck your results. Take your time with this and readjust as needed.
Eventually you will have 72.0°W perfectly calibrated.
The next step will be to test the rest of the satellites on the arc. Don't be surprised if they are not tracked perfectly at this point and that further adjustments are required. This is typical for a first time installation. Obviously, this sounds like you will be defeating your initial alignment work on 72.0°W, but you will need to understand that not all the satellites and TPs are really that perfect and neither is your dish and your motor. It is therefore required for you to "comprimise" in order to get the entire arc to dial in with a motorized dish.
With a single, fixed point dish, you can align to the maximum signal on most all of the TPs from that satellite. However, when aligning a motorized dish, things are not quite that nice. You might have to sacrifice a bit of signal quality on one satellite to get a few others to come in. You will never get every satellite to come in with 98%+ signal quality on a motorized dish, but if you spend a lot of time with it, you might get a majority of the sats to come in with SQ in the mid to high 80's.
What I am trying to tell you is, when you get to the point of trying to track the whole arc, don't be greedy and try to get the maximum possible signal quality on any one satellite as that will inevitably reduce the quality on a number of other satellites.
There are several approaches to calibrate your motorized dish to the arc. Everyone of them require dedication, time, persistance and patience.
1] Start with your nearest true south satellite and work your way to both ends of the arc a little at a time, back and forth, making the finest (smallest) adjustments necessary to just get the signal fairly well above the threshold of the receiver. In your case, with the Coolsat 6000, this is roughly 63%, so try for something in the mid 70's to mid 80's to begin with. Then start all over from the center (true south) and work your way back out to each end of the arc once again.
2] Start at your nearest true south satellite and go as far east as you can and still pick up a satellite and fine adjust your dish elevation. Then drive your dish as far west as you can and still detect a satellite and fine adjust your azimuth. Then go back and forth, east/adjust dish elevation - west/adjust azimuth, over and over again until you reach the furthest points on your arc, then repeat as necessary. In this approach, it does not matter which axis you adjust on either side of true south, just as long as you always adjust that one axis on that side of the arc and the other axis on the opposite side of the arc.
These are just two calibration methods that you can try when you get to that point.
RADAR