There may also be a procedural move that is require to be filed at a certain point that they want to delay. I'm not super experienced in criminal law..and have no knowledge of WI criminal law...but

In civil law...if someone files a "complaint" against you...you can file an "Answer", but if you do, then you are accepting certain facts, that once you file an "Answer" can no longer be challanged. However, if the "complaint" is lacking...you can file a Demurrer and have the case thrown out or attack certain parts of it prior to being required to "answer"

Again...I don't know criminal WI law....but like that civil process it MIGHT be a delay tactic to stall for an actual private defense attorney to have time to apply procedural technical process prior to transfer to Wisconsin.