I've had this problem in the past (and may actually this coming week as well- same problem as you- no home games this week), and haven't had an issue yet. I think it's as other posters have said, two economic updates in a row, not relative to the day you went into debt (though presumably that would be on your economic update).
Purely out of curiosity, I've been wondering about a cheat around getting all of your players sold off. Say, like in this case, you're in debt for the week and project to get out soon enough, but in this pretend case, you'll go "bankrupt" having been below $500k two weeks in a row. Rather than having everybody sold starting at $1, could you circumvent the rules for a week and put all of your players at a ridiculously high transfer price, say on Saturday, so that come Sunday they're on the transfer wire, but stand no chance of being sold?
Purely hypothetical.