Stick two or more cards to a hero and Blood Geyser

[Luitse]

Hello everyone, nice to meet you. I started to play Munchkin CCG last week. Can you help me with some questions?

1) Can you stick 2 or more cards to a hero. Even if the cards are the same? For example two “Skewer” on a hero causes “Bleeding 2” during the reckoning step?

2) With the card “Blood geyser”, can I zap my “human wizard” so Blood Geyser costs 1 less, and then use the “Give blood 1” so the cost is “zero” and I can use it for free?

Thanks for your help.
Luis.