How do I handle this situation?

First, I should give a little background. I am a Mom, I work part time, I'm organized (sometimes over organized), I'm responsible with money and budget well, I have creative ideas and know how to implement them. I'm not trying to brag about myself, but, want answerer's to have a good view of who I am. Now for my dilemma. Recently my younger daughter registered to play soccer in the same league that my older daughter played in for 4 years. I volunteered to be team parent. This job includes, but is not limited to, organizing fundraisers, concessions, banking, ordering player and coach shirts, parent updates, etc..etc..etc.. The league organizer chose two other parents to be team parents. One whose daughter will "age-out" after this season, the others daughter still has one more year to go. That is not what bothered me at all, fine, he saw qualities in these other parents that I must not possess. However, I was asked to still help them with whatever they may need. This too, was okay with me (maybe I'm too pive...). So, I sat in on the first meeting (invited). This meeting was mainly a brainstorming meeting about how to raise money for the girls. I had many ideas and voiced them. Now, tonight I show up to the field and the team parents had used my ideas (which is great) but, instead of coming to me about what would be the most beneficial way to implement the fundraiser, they had gone to another Mom who showed up today with a computer printout of a company she found online that sold the items I had suggested we sell! Did they not think that I had researched companies and weighed which ones would bring in the most money??? Then, they ask for help from other Mom's with things that I've already done with my older daughter and I know how to do. They'll walk right past me to ask someone else, instead of coming to me. How should I handle this?? Part of me wants to stop helping altogether, but, in the end it only hurts my daughter if I become one of the Mom's that don't help her team... Yet, part of me wants to step in and make it known that I've already done all of this with my older daughter and I can be helpful to them. It all seems so petty and childish, but, I'm hurt by this. For one, those were my fundraiser ideas and they're something the other teams have never done. For another, I've been involved with this league for 5 years now, and I have another child moving into the league in 2 years, so I'll be able to continue longer than they can. What to do? What to do? Any input??