What is going on here?

A little flexi-weirdness isn't a big deal, but do you even have the right parts? A '78-'79 308S uses a completely different bushing design in that location than you've shown (although this is the euro SPC: 2 rubber cones (item 27) over a steel inner sleeve (item 28), and the drop link itself is the metal outer sleeve, not a metal inner sleeve and a metal outer sleeve like the item 26 upper bushing):
Ferrari 308GTB/GTS Parts : Table 39 - REAR SUSPENSION - WISHBONES

Or is your photo of just the bushings the upper bushing removed from the drop links?

 

If your photos are with the suspension "drooping", take into account that the location of the mounting stud on the end of the rollbar will move fore-aft relative to the droplink when at the normal ride height -- but these aren't precision machined parts (so a little "flexing" to get things together isn't a huge sin IMO).

 

Eek -- then that is kind of off (but not much you can do but flex the upper bushings). Aftermarket Brackets/Bushings (Prothane?) that go around the roll bar itself (like items 22/23 in the SPC figure) might have slots in the brackets (rather than holes) for some fore-aft adjustment, or you could slot your stock brackets -- just a thought...

 

The horseshoe shaped bracket attaching the bar to the frame often gets bent from being jacked there.

Misalignment to some degree is the norm though. That is why they use such gushy bushings on those. I find I usually need to leave everything loose to get the links over the bar end. The angles and distances vary a lot during suspension travel.