I kno a couple of characters can do lvl1 into another lvl 1
such as…
Terry qcf qcf k, qcbhcf p
Kim qcf qcf k, 180up hcb k
akuma hcb hcb p, qcf qcfp (in corner)
Im sure there are more…
and thats where u guys come in! =)
Iori - wine cup xx whatever
Rugal - god press super xx kick super
ryu(corner) - shinku hadoken xx hurricane kick super
cammy: shaft breaker(dont’ mash out full hits), shaft breaker(1hit)
yeah ken can do the same thing with his shinryuken. I think it works with any super with mashable hits (are there any others?).
blanka - earth shout
…
i actually never got this to work, but then again i didn’t care too much to figure why it didn’t work. 
guile - total wipeout, somersault justice
guile - justice x2 if juggled properly
kyosuke - infinite
iori wine cup, maiden masher lol
chun-li kick super XX jump kick lvl 1 fireball
(off a dizzy) Rolento steel rain, trip wire or bombs hahaha :lame:
Dan super fire ball, then combo super in corner.
you gguys, whats a raging storm?
Sagat can probably add a lvl1 hotfoot after a lvl1 low fb super in the corner. You might have to put some distance between him and the opponent though, probably by linking s.LP or s.LK a couple times.
Guile can’t do lvl1 Total Wipeout, lvl1 FK super. There’s just not enough time. You need lvl2 or lvl3 FK super.
I’m pretty sure Benimaru can do two lvl1 supers in the corner. Dhalsim can do the same thing with his lvl1 upflame super, but if you use it as antiair you only get one extra hit out of the second one.
Of course Kyosuke can do stuff like lvl1 pillar super jumpcancel air lvl1 kick super.
I think that’s about everything, unless you count the possibilities after interrupted lvl1 supers like Balrog. But there are too many of those and they are too situation specific to bother listing.