Events+, Membership and MarketPress integration - quirks


I'm listing events and taking payments through MarketPress using the "Payments via MarketPress Products" add-on for Events + and also I'm using the "Membership Integration" add-on for Events+

I'd like to offer a discount for members who attend a particular event and for the transaction to happen via MarketPress.

I'm able to offer the event for free to members by selecting Membership Fees: Event Price in the Membership Integration section, but if I choose Membership Fees: Member Price, and then add a discounted price, this isn't seen on the front end. The registered user just sees the normal price.

Also, I notice that on successive updates of the page, the product selected in the "or, please select a Product:" dropdown disappears and needs to be chosen again. The price box similarly appears and disappears.