I would bet this is happening since Ebay changed it's policy's to over protect the buyer and screw the sellers, what happens plenty of times, is that if you remove the money out of your Paypal account, and this happens, they cannot pull the funds out of your account.. UNLESS, you make a paypal account payment if you use their credit, or attempt to make a purchase..
I had someone claim they never got a PS4 I sold last Nov, when I entered the tracking info, I put one digit in wrong, the buyer (who got the item) never once contacted me, and just filed a claim saying it was never shipping and an invalid tracking number was listed.. I quickly checked the tracking, corrected the mistake, contacted the buyer stating I had put 1 digit wrong in the tracking number, showed her who signed for it, when it was delivered.. I had emailed her at least 8 times with my cell number, email address, everything... she let it go all the way to the dispute to let Ebay settle it.. Ebay and Paypal then attempted to pull almost 500 bucks out of my Paypal account, I had already pulled the money out... HOWEVER I had 100 bucks used on Paypal credit, so when I paid it off, they not only deducted the 100 but the additional 500!! Needless to say I was shocked.. I contacted Ebay support every day, finally called them, got a rep, explained exactly what this buyer was trying to do, and won the case.. but it tied up my money for almost 2 weeks..
This is bad news all around, yes you appeal to all different buyers, more so than anywhere else, but 180 days?? That gives a person 6 months to enjoy whatever they got from you, then return it, get all their money back, and send you back a used item.. Once this gets out, it is over for me with Ebay.. going to have to try using the Amazon service to sell on.. no idea if they get the same results as Ebay, but seriously what choice do you have? Plus Amazon does NOT take Paypal!