One more thing to be aware of is that folks have been on Holidays recently. The command module isn't staffed by that many droids- so the amount of time available may be at a premium at the moment.
Also they have been making more effort on the comics conventions - preparing for San Diego, travel time, jet lag, etc. must really eat into that valuable comics making time and I think we'd all rather focus on that

If I do send another without hearing about the first, though, that's technically breaking the "no more than one submission at a time" rule.
I don't recall ever seeing such a thing written down ... can I ask where this "one submission at a time" rule comes from?
I think the idea is from the submissions page (and possibly some general advice on the forum:
HOW TO SUBMIT
You should enclose a one-page synopsis along with your five-page script. Because we receive so many submissions, we will usually only read the synopsis at first. Only if it engages our interest will we read the full script. Sorry, but that’s the way has to be!
Always enclose a stamped, self addressed envelope, and await our response before sending further submissions.
Source - a cache of the original
I suppose what Tharg doesn't want is vast amounts to work through. If you submit one story at a time then you take your time, make it the best it can be and you give Tharg enough time to read it before the next one arrives and possibly head you off at the pass if you realy need to get more practice in before submitting again.