Does Sprints Unlimited texting plan include unlimited picture messaging?

I am having problems with this myself. I got the 1500 shared plan with unlimited messaging. The guy at the "Sprint" store told me I could send all the text and picture messages I wanted by adding this plan. I had a old Nextel plan when I went in and was just going to add the messaging, but was talked into the new plan as I would get extra minutes and basically the price would stay the same.....wrong!!! Last months bill had casual data usage on it. I called the tech dep. and they said it was from sending pics, but that I should NOT be charged. I was credited back the money. On this months bill same thing, casual data fees, this time they say it is because the pics have to go through the web. So they offer to upgrade my plan so I wont get charged, but at 15 dollars per phone!!!! So I am paying for unlimited picture mail, but have to turn around and pay to use it??!? I was pissed. Going back to the store and pretending I have no phone and going to ask sales person what I get exactly, and if it is different from what I was told I am gonna whip my bill out and say I want my pics free like I was told or want them to drop my contract for false advertising.