Hello, I am hoping I can get some help with my basement rough in. When we bought the house we paid to have just a half bath rough in done. I am attaching some pictures to help. I know my toilet flange is the 4 inch. I popped off the caps on the 2 inch pipes. The middle pipe had no water in it so I poured some in and it drains right out. The pipe on the right had water in it, so it must have a p trap in it. So that doesn’t make sense as we are only supposed to have a half bath. The measurement from the 4 inch pipe to the pipe on the right measures 30 inch. There is no way the vanity can be for the middle pipe as it’s way to close to the toilet. Even more confusing is the 2 inch pipes do not line up, so I couldn’t even put them in the same wall. I feel the builder made a mistake. Any suggestions are much appreciated.