Re: Does "detained in absentia" count towards any future jail time?
If he had spent the time actually being detained by Swedish authorities, then yes. But since he is on the run, his self imposed detention doesn't count.
"Detained in absentia" means that once he is actually detained, he will immediately progress to the second stage of pre trial detention without any court ruling.
Of course, if he ever is brought to justice, charges long prepared will be brought against him rather swiftly, with no deed to renegotiate his detention...