If t-a-k  sets up a connection, but then some other process alters its presence, then t-a-k doesn't handle what to do at all. The only case where it does^Wshould work is when taking the connection offline.

What should happen: The CurrentPresence property for that account should be updated to reflect the changed presence, and nothing else. 

Quoting IRC discussion on the subject earlier today:

<grundleborg_q> smcv: what should AM do in the following scenario: Account is brought online, then someone disconnects said account directly without going through the AM?
<grundleborg_q> smcv: should it reconnect automatically? what if connect automatically is set?
<smcv> grundleborg_q: unspecified. I'd make it do nothing until the next time RequestedPresence is changed
<grundleborg_q> smcv: ok cool - thats easy :)
<grundleborg_q> I'll just update CurrentPresence then
<smcv> grundleborg_q: out of a vague feeling of "well, the user knows best"