You should be able to view purchases going back 7 years. Just go far right on your Purchase History pge and select the year you wish to view from See Orders : All.
Which device are you using ? If the app I believe, as I don't use this device, there's a new version to update.
If you can, try and switch to a PC / laptop, and use Chrome or Firefox they work best with eBay, there are less issues there.