Opposing Seconds with dots

[tisimst]

With two voices, I would never interpret that as a staccato (since it should always be pushed outside to the stem), but someone might. That’s a tough one. Might be best to push the dot just a hair to the right to give it that extra clarity without moving it too far from the notehead it goes with.

[OCTO]

I just saw some work done in Sibelius with the same issue: don't know if it's a default.

Finale seems to do this, too,

Screenshot.png

which possibly looks like a staccato dot.

But this is possible when the upper voice is on the staff line. Would be more difficult to do as in your original example.