Sorry for the confusion - they have advanced their payroll for a total amount of 13 weeks (accumulated through multiple pay stubs), while they have requested still getting paid weekly like the rest of us. So their behavior seems like they are trying to max out the values before they check out.

Their advances will probably last us another 2 weeks, and we only have 8 weeks of runway left because we are at the end of our pre-seed incubation program, and we are about to raise our seed round with our lead investor in a few weeks.

I can't agree more that this will eat up our time and resources very fast, but we also want them out before we pitch to our lead investor for the seed round. We have already spent a week investigating this issue ever since we noticed something wrong, so we have a very narrow time window for us to take actions, ideally by early next week.