I was raised LDS and live in Utah. Pretty much what's already been said is true but something did catch my attention. They referred to themselves as "the Sisters". While sisters is usually the title women use in the church it is also the specific title used my female missionaries. Do they have a black little name badge? If these sisters are missionaries, buddy just move on. It ain't happening. From how friendly they are being and everything you mentioned I highly suspect they are. You can just ask them it's not a secret or anything they will tell you. If they are they are dedicating 18 months to God to serve and can get sent home and kicked out of the church for any sexual acts while on their mission. That's a huge social disgrace and all of their friends and family would know about it. They ain't risking that for a roll in the hay with you, I guarantee.

Even if they aren't missionaries you're fighting a huge uphill battle with these girls. Time better spent chasing someone you might get somewhere with.

Can you imagine how much you'd progress if you'd stop this mental masturbation bullshit and just talk to women?
You know, on the street. At the bar. At the mall. In the club. At work. At the grocery store. Take your damn pick.