What is wrong with, "jughoqlI''a'." ?
I don't see anything wrong with it. Was it marked wrong?
Quite possible; that alternative had not been included so far. I've added it now.
I thought -li' indicated that the verb in progress had a definite ending point, as in tera' vIjaHli'?
On the other hand, if "you" are premanently stationed as a spy, not gathering any particular information, but rather just doing ongoing continuous spying, then -taH would be the better suffix to use.
True. You have to be making progress towards this ending point.
Which in the case of spying is presumably something like “when we have gathered the information we need”.