That happened to me several times the first time I was there with a mobility impairment, too. It seems to be luck of the draw, depending on the CM's you get.
For instance, the first time I was back at WDW as an adult, I was using an ECV because of a broken foot. I had no concept of how long the Pirates queue was, since I hadn't been there since I was a kid. The CM saw the crutches on the back of my ECV and asked "Can you walk a few steps on your crutches?" I said yes, and he told me to park the ECV and come back then he sent me through the queue. Well, as you all know (but I didn't at the time) the distance between ECV parking and boat boarding is more than ANYONE'S idea of "a few steps!" (Since he described it that way, I thought he was going to send me through an alternate entrance or something.)
Then, when we got off, the speedramp to go back up was broken. We asked if there was any other way to get out. The CM said there was an elevator but they weren't supposed to use it. So, I started hobbling up the ramp. I made it about a third of the way up before I realized there was just no way I could do it. We turned around, and then had to fight our way through the crowd like the only couple of salmon swimming downstream, while everybody going up either ignored us and plowed into us, or yelled at us for being in the way. The only thing that kept me upright was the fact that there wasn't enough space to fall down.
When we got back down, there was a second CM on duty, and after arguing some more, he rolled his eyes and said, "Well, we're really not supposed to, but I GUESS I can send you up in the elevator JUST THIS ONCE," like he was giving us a free ticket to the park or something.