Based on http://deckbox.org/games/mtg/cards?f=53161 you'd think the Asian Pacific Land Program cards have only one type but they in fact have three, per this:

http://magiclibrarities.net/44-rarities-apac-lands-english-cards-index.html

Same thing for pretty much any base set, be it Theros, Innistrad, or whatever. I think it'd be useful maybe to have a drop down menu for cards with multiple different types in the same set where you can hone in on the particular one you have.

For basic lands, it's probably not as much an issue, but for (for example) the foil Zendikar full art lands, saying you have 2x islands, when each island is ~$20.00, would be kinda useful. What if someone's trying to get a full set of Islands. Person A says they have 1x and I have 2x different ones. But is there 1x one I need? Right now you can't really know.

Yep, handling of different printings is still a bit confusing and incomplete. I'll be working on this in the near future.