(Ninja'd)
The problem is you have conflicting behaviours. Solid is saying "don't move over a certain object", and Pin is saying " ALWAYS move relative to the parent". You can't have it both ways - something has to give. So it seems Pin trumps Solid. It's not clear what you would expect to happen. Do the Blobs stop moving or do they stop the player from moving. The last won't happen as the Pin mechanism is one way. Player affects Blob, but Blob does not affect Player.
People keep trying to use behaviours with Physics, but Physics doesn't behave well with any other behaviour, in general.