A few additional thoughts. First, agents should never, ever lie. If an agent told you that two listings were sold--and they weren't--that's absolutely unethical. And, really, most agents will not do that. Most are honest.
Mack's correct that there's very little money for the agent at the initiation of a lease-option. That's because the initial transaction is only a lease. And while commissions are negotiable, if the property leases for $1,000 a month and the commission is--let's say--6%, and it has to be split 4 ways (the two agents and the two brokers), then your agent may receive $150 for all of his/her work. If you exercise your option in a few years, and if that agent is still with the same broker, then the agent will receive the commission for the sale.
So, one possibility, as Mack suggests, is to pay the agent for services provided.
Another possibility is to have some or all of your option fee flow through the seller to the agents involved--kind of an "advance payment" on the commission. That is, if everyone agrees to that. Or there are a number of other ways--there are a couple of other active threads on Trulia that go into that in more detail.
Finally, here's a link to a blog I wrote on how to find lease-options. In some cases, a Realtor is involved. In other cases, one isn't. http://www.trulia.com/blog/don_tepper/2010/03/how_you_can_fi
Hope that helps.
The fee on a lease-option is minimal at first and uncertain at best. For the time, Abby, that an agent can be showing you homes and trying to negotiate terms - which are wildly non-standard - that agent can be showing homes to a homebuyer for a fee several times greater than they would receive from the first part of their transaction.
All the best,