This Tiger takeover has apparently been in the offing since May last year when the plug was pulled on the Sartori (due to Tiger's interest offering a higher return).
So at some point between then and 21 Feb, Eales and Tiger have agreed a deal I assume based on known assets and liabilities of the club including whatever bank accounts were there and what was owed to Eales/Ensco.
My guess is perhaps as far back as January or earlier the deal is done on the basis that Tiger puts the cash in to settle bills - but then the takeover has dragged on and on, perhaps fit and proper tests etc. Meanwhile assuming the players get paid, but accounts get told not to pay the big bills like HMRC because Tiger will be buying the club and putting the money in to pay them.
So reminders turn up, but the takeover means nothing is done until the winding up petition goes in?
Just guessing of course.
Other guesses could be that Tiger has been having trouble finding the cash to fund all this, hence only paying on the winding up petition, and who knows where he got the money from?