How does this possibly make sense?

So 2 weeks ago I call and make an appt to see a provider that was visiting the DC area and has been here for a while now -- she has 2 pages of solid reviews on TER (most recent one though more than 6 months old however).  

So she picks up the phone, I get told the exit to get off at and then to call her when I get there.  No problem.  I get there, call her, no answer.  Pull over on shoulder, call twice more in the next 20mins, no answer.  I text asking her to at least let me know if she's going to cancel so I know to not wait around.  She immediately calls after receiving this text and tells me something came up and how about we do it tomorrow and I give her a call at like 6 or something.  

I didn't call as it didn't feel like we had officially made any appt and it was just me attempting to call back and try to set something up.  So fast forward to today I see her ad again so I call back up from my phone # but no answer.  I decide to call back 10mins later out of curiosity using my brothers cell and she answers the phone immediately and politely/efficiently sets up an appt with the same instructions as 2 weeks ago -- to call once getting to exit.  I get there, same response, no answer, no call.  I call twice within 30mins and get no ansewr.

So at this point I'm just completely perplexed at who sets up appts to just cancel randomly so I call a friend of mine and ask him to see if he can call and get an answer and if he does to set up an appt.  He calls her like a few mins after she had been not answering my 3 calls that I had made in the past 30mins and gets a swift answer and her efficiently setting up an appt and he is told to call in 15mins to get rest of directions.  In 15mins he calls back and no answer either.  He calls back twice within a 20-30min time period to get no answer at all either.

Is this some kind of prank?  Can someone tell me what possible logic explains how this makes sense?