Sorry about that..I'm not at home right now or would post a screenie..
In the ME, when you place an asset, you have the symbol buttons that are for flight planning, load-out, waypoint action, radio freq's and failures (more or less depending on airframe).
If you set the KC-130 up for "Tanker" and "Activate TACAN" via the 2nd button (waypoint options) and change from TACAN 1X to anything else, it does not actually change the TACAN frequency leaving it on 1X.
Below this on the very bottom you have the tab button that is labeled "(Advanced) Waypoint Actions". When you drop a KC-130 on the map, the "Tanker" and "Activate TACAN" are automatically populated in this area, with the default 1X for TACAN.
from what I see, and the issue that I was having was that I was adding and adjusting the options via the top symbol button, but it was getting over-ridden by the bottom "(Advanced) Waypoint Actions" tab, so when I set it to 16X above, it defaulted to 1X below, and only read that information. Hence, nothing ingame for 16X, but received signal for 1X.
If I adjusted settings on the bottom section only, all changes were reflected in game and everything worked.
Really hope this explains this better....