Unless I'm missing something the mobile version doesn't scroll down. So it's just the 3 per page.
It's not been a problem so far, for me at least. I recommend just being more selective with saves for now or saving over stuff you don't need anymore.
As I don't package the mobile builds, I'll admit to not being 100% aware of how many slots there are as I keep getting conflicting reports from people who use it as to how many slots there are.
Originally it was limited to 3 because of how the screen real-estate made things look and how difficult it was to scroll through them. But then reports came in that there were in fact 20 slots per page, so I didn't question it.
Still, that's 30 slots and should be enough. I can talk to Vanzo about how we can potentially get around the navigational issues but until then I'd say do as the others have said and try and be slightly more selective on where you save.