Either I'm going mad or something has broken since I updated Lightroom a couple of days ago!
In the film strip, If I want to re-order the photos, I used to just CTRL-click several (or if in a straight line SHIFT-click them) then click, hold and drag them along the film strip to the new posistion. That's how I've done it last 6 years anyway.
Now, if I CTRL click or SHIFT click, when I then try and click to drag them, it just de-selects everything and selects just one.
Any clues? Getting close to throwing the PC out the window right now.
It still works for me, Lightroom CC on Windows 10. Just be sure you are clicking on the image itself and not on the gray border surrounding the image.
It's just gone a step further and now won't let me drag in filmstrip at all lol. in Win 10 as well, definitely not clicking gray border!