Propolis

No — when you Deploy Worker Beeples you must place them onto a completely empty Landscape Card (you may then put them on any of that card's available spaces), even if earlier players did not use all the spaces on that card (p.6).

You may place multiple Worker Beeples on the same Landscape Card by using different available spaces on that card, but you must start on a Landscape Card that is completely empty; each Beeple placed occupies one available space and grants that space’s reward (p.6).

Yes — Fortifying (tipping) a deployed Worker Beeple lets you regain the reward you collected when you first deployed it, you may fortify any two deployed Beeples (same or different cards) but not ones already fortified, and each fortified Beeple counts as 2 toward majority (p.7; majority counting p.10).

The majority winner immediately takes back all their Worker Beeples from that row to their personal supply (and if they are not the active player they gain 1 Wild resource), while all other players keep their Beeples on the row; then remove the right-most empty Landscape Card, slide the row left, and draw a new Landscape Card into the right-most slot (p.10).

At game end total your unused resources on all six tracks, divide that number by 5 and score that many points (rounded down); permanent resources also count for Structure scoring, and wild (permanent or unused) resources may be treated as any resource type when scoring (p.11; clarifications p.15).