From SMK:

A couple of weeks ago, we "downgraded" the clitics in the sort by preceding any clitic values with "0000_" when generating the sort key, and then stripping the added bit out again before calculating the indent levels.

I think we need to precede the aspectual affixes with 0000_ ... and then downgrade the clitics further by preceding them with 0000_0000_.

These are the aspectual affixes:

s-IMPF
ʔas
ʔac
sac
kaɬ-PR
kas
mix

And these are the clitics:

kn
kW
kp
kt
lx