For the Paypal issue, it's not something we've ever seen before. Based on what folks have sent me regarding the message they received it looks like those payments will eventually go through (the orders are listed as "pending" in Shopify). We're going to setup something following tonights batch so that the limited items from today don't get auto-restocked like normal due to cancelled payments just in case the pending Paypal cases go wonky, that way we'll be able to recreate those orders next week as opposed to them getting restocked and other folks buying them. So if you're having this issue, and your payment ends up getting declined causing the order to get canceled, open a support ticket and we'll get something sorted out.
Regarding the limits not getting posted to the product page, I'll bring that up directly in our next meeting.