Sounds like they told you about both the plan 3s available, and threw in a plan 2 just in case you decided to show interest in that plan. Exactly what you’d expect them to do if they wanted to sell you a house, but not worry you about market conditions. I bet if you tell them you’re interested in the plan 2, several other plan 2s besides the one they told you about will “suddenly” be available.
As far as switching them to smaller models, I suppose that’s possible. But most of the lots are relatively big. As you probably know, the “Ridge at Saratoga” was originally supposed to be 3,000-3,600 sf. homes to be sold about 2008. They suddenly changed those to 2500-2750 sf Saratogas and started selling them this summer instead. Trying to beat the crash, I would think. We’ll see how they do.