I don't know the laws in Ohio since I've been in Texas most of my adult life, but the fact she's been dragging her feet on the D and is now actively trying to buy a house raises some red flags with me.
Here in Texas, the moment a divorce is filed, all major assets and money transactions are supposed to be "frozen" until the case is settled. This protects both people from the other. It seems to me like she may know this and she is delaying the filing until she gets what she wants first. You may want to shoot a quick email to your L and see what they think. *IF* this is the case, I am not sure you could do anything since technically the D hasn't been filed, there's not restraining order in effect for the finances.
From the emotional side, the signs and interactions are all still confusing, isn't it? She's cordial and friendly at times, and then she mentions the D paperwork. I feel terrible for you, I know that roller coaster all too well.
If it makes you feel any better, I asked my W recently why she did some of the things she did when she still loved me (unbeknownst to me at the time) and she said it was to hurt me and get my attention whenever I started to become more detached than she wanted. So who knows, in your case she may still want to R but makes these threats to rattle your chain.
It doesn't make sense for someone to do that to someone they love, but I just learned it does happen. LOL
Hang in there buddy, you are doing great!
Me: 43 W: 37 Together: 18 M: 15 D: 8 yrs old ILYBNILWY: March 2011 She Filed for D: August 2011 She moved out: Sept 1, 2011 Reconciled: May 2012 Divorce Case dropped: July 2012