Can you make combining postings a bit smarter please?

It would that the combining of various feeds does not work if there's a time difference of more than a minute or so between fetching/viewing.

For an example I mainly use twitter and Pownce with SocialThing:
24 mins ago SocialThing checked my Pownce friends and found one update - and displayed the one new item.
A short time later I am informed that I have two updates from twitter. I check and find that the oldest one is the twitter version of the Pownce update. But instead of being combined with the Pownce version, it is it's only entity. So one new twitter post to read in fact.
A few mins later, I am informed that I have one new Pownce message to read. This Pownce message however turns out to be a copy of the youngest of the the two twitter messages before. Again this message has not been combined.

The interesting thing about this four messages is: when I look at my time line, SocialThink knows that the time of posting for the 1st pair was 32 mins ago, and the time of posting for the 2nd pair was 27 mins ago. It just hasn't combined them.

Interestingly enough I don't seem to run into this issue much if I'm haven't been logged into the site and I'm reading catchup on people's postings.

I guess in short I'm asking, could we have the combining be a little smarter please?