Either way, asked to be compensated. 

If you had one this would be properly handled by him.You draw the line in the sand, which it sounds like you have also not yet done, based on your comment that the sellers agent is going to "try" and get rid of the tenant.You tell them that if they are not out you will request a extension and be holding the seller responsible for all of your costs and compensation for your inconvenience.

Or, is there some distant cousin that's going to show up with a valid claim that they had some ownership and were not properly compensated? 

That is simply because they are higher risk for the lender since they are not insured by a government entity and the lender will demand to be compensated for that risk. 

Long story short.......as long as you are compensated for the risk or cost to remove by a good purchase price......then I don't see the big deal personally. 

If there’s no history of problems in the area and I was doing it as a buy fix and hold I’d probly hold off on the inspection, if your going to flip it and there is known problems in the area you might want to know what’s there because the next buyer is more likely to look and if there’s problems they will likely be asking for some kind compensation.

They get compensated well for helping out.

However, if any of the employees are greater than 2% shareholders, the health insurance premiums are included on their W-2 as compensation. 

So it's just spelling out what the co-op commission is so we're all in the open and the seller understands that I am compensating the other agent fairly and not harming their chances at a solid offer by going cheap on the co-op fee. 

Whose agent has the contract, if it's your agent, you don't have an exercised agreement yet and you can cancel but you'll likely still have to compensate your agent.