My Agent wants me to sign a "buyer's-Broker" agreement. go/no-go?

[Ray Loveless]

So I'm searching for a Multi family property in Utah, I've contacted some agents and let them know I'm looking.  One agent, who I've worked with for a bit, send me an email stating they have an off market deal and that they've "Attached is the Buyer Broker Agreement so we can represent you and show you the property".  It goes for the next few months.

Its my understanding that if I sign the agreement I have to stick with that agent for the next few months and I can't purchase a property through another agent if another agent brings me a deal.  Is my understanding correct?  Should I sign it?  Would it be "bad form" for me to not sign the agreement sense they've been doing some work for me?   Thanks.

Also, I'm working with a property owner on a  "for sale by owner" on a deal at the moment.. would this agreement affect that deal.

Thanks.

-Ray