MARLAN_

An L&S (designation) isn't a lock, a lock (and only is) is STT, even if you were hypothetically in STT, there's nothing inherently wrong with locking (or designating) a friendly, its also standard practice to lock a friendly that you are rendezvousing on.
Its realistic/expected behavior that TWS mode will always designate a contact, this is an employment mode. However this behavior is extremely frustrating without ED having implemented offboard designation, it makes it much more annoying to use than it should be.
In RWS if you really want to have no L&S you can press the RSET button, however there is really no problem having an L&S set, pressing RSET in this case is solving what shouldn't be considered a problem.
The NWS/Undesignate button will step contacts when used in RWS/TWS (albeit we aren't currently capable of stepping to offboard tracks... hopefully soon because boy is it annoying)

Its your B-sweep, its stationary because you're in STT. (Not new symbology btw)

Reset re-initializes the radar mode, it doesn't mean it removes L&S (the ED guide here is wrong). You should always have an L&S when in TWS, the change is correct, the guide needs an update.

Per the latest update (though I haven't had a chance yet to test it personally) it sounds like ACLS in MP has been resolved.

It does not extrapolate the ship's future position, you will need to adjust as you approach.

The current behaviour in DCS is correct.
When the JDAM is explicitly deselected it will become unpowered and lose its alignment.
You can however select another weapon/mode/etc. and come back to the JDAM and it will remain powered and aligned as long as it is not explicitly unboxed.

I've had the same issue before, previously fixed it with a 2% dead zone, was having issues lately again, noticed my stick pitch had drifted to ~3%.
Recalibrated today, everything is hunky dory again.
I don't believe this is a DCS issue, there's a good chance it's your hardware, recalibration would be my first bet.