Well, if you put it on to 16/8 you fucked it up, lol. you caused a re-vege.
Once you start flower (12/12) it must remain on that schedule until the end. You will likely have 3-4 or more weeks of re-vege. whatever buds grew might ripen, but as the stems elongate again, they'll spread out and get larfy.
The funny leaves are part of re-vege symptoms. you'll get a shit tone of useless branching, too. Funky leaves and a mess for a month or more. Sorry, bud.
DLI is DLI. 35 dli over 12h is the same as 35 dli over 18h, so autos and photos can be grown in the same tent with zero negative effects.