This is unreasonable and I would be surprised if it's permitted by their agreement with their customers (umm, I mean "limited partners"). Not that you could find that out.
Note that their customers are already paying them 2% of the commitment every year to pay their expenses. So it's already unreasonable that most VCs use the capital invested to pay their own legal costs (that's supposed to come out of the 2%!). Having them transfer additional funds they pay you back to themselves borders on fraud (the LPs are committing money on the promise that it will be invested in your growth).
If you have another VC option I suggest you take it -- this may be a sign of problems to come.
If you have no alternative...well you have no alternative.
Note that their customers are already paying them 2% of the commitment every year to pay their expenses. So it's already unreasonable that most VCs use the capital invested to pay their own legal costs (that's supposed to come out of the 2%!). Having them transfer additional funds they pay you back to themselves borders on fraud (the LPs are committing money on the promise that it will be invested in your growth).
If you have another VC option I suggest you take it -- this may be a sign of problems to come.
If you have no alternative...well you have no alternative.