H2O: Just Add Water (2006)

Bubble, Bubble, Toil and Trouble - S2-E22

Continuity mistake: Cleo, Rikki and Emma are sitting together in their school campus grounds. Cleo is sitting upright in the wide shot but she's leaning to her left in the close-up. (00:10:10)

Moonwalker - S2-E13

Continuity mistake: Near the end, Lewis spits juice at Charlotte to see if she is a mermaid. Rikki looks shocked in the wide shot but much calmer in the close-up. (00:23:05)

Dangerous Waters - S1-E9

Continuity mistake: When Rikki decides to go after the illegal fish seller by herself, she hangs up her beads on the banister. The beads change position between cuts. (00:14:00 - 00:14:35)

Louise Chatham: Don't ever talk to sea-perch. You never can trust those fish.

Lewis: Hey, Zane. You're dry. That must feel different.

Bad Moon Rising - S1-E18

Rikki: I can't do this anymore.
Zane: Do what?
Rikki: This. Everything! It's too hard. No one understands.

Show generally

Question: Is it true that this show was originally supposed to have only two seasons but its popularity was so big that they created a third season?