One of them seems to support what the neighbor is saying, the other seems to support that the neighbor is incorrect and does not own part of my driveway.Any thoughts on strategies to resolve this before I spend $1,000 on a survey?

No matter how good your manager is, numbers can get keyed incorrectly.

Even though your handyman may seem reliable and hard-working now, the second that work is done incorrectly, all liability falls on you.

Lastly, I take issue with the "All LPs must participate language" which is likely incorrect but I recommend reviewing the PPMs with an attorney. 

So, the delay is most likely caused by the tenant - either incorrectly entering info or not having proper funds in the account and the systems trying again a day or two later.

Perhaps one of your transactions was booked incorrectly.

The term is C/O is used loosely and in many cases incorrectly.

One incorrect depreciation entry for one rental could impact you for 27.5 or 39 years and cause more filing fees to correct it. 

Incorrect, Thats what the " experts" said 7, 8 9 years ago when we were buying all in 15- 25k.

You might have been filing incorrectly in the past and might be owed some money.