this seems to close mIRC on win98 and winME i believe on all versions of mIRC...

dialog -m A A | dialog -m B B | dialog -c A | dialog -c B

now with the help of a few people we found that the following works:

dialog -m A A | dialog -m B B | dialog -c B | dialog -c A

Is it order of open sensitive? also seems that -x instead of -c is ok also.. now if it is order sensitve.. then why only on 98 and ME OS? As it doesnt skip a beat on 98SE, XP and i believe 2000.. using either of the above examples.
I tried on v6.03+ all same results..