You need to provide the service file that you wrote, please edit your original question with this. (Should have been a comment but I don't have the permission).

The base issue is that your service file has created a loop in desired startup order. Example: systemd wants to start `a` first, then `b`, then `c`, but `a` wants to start after `c`.
I would suspect that the two guilty lines are the `BindsTo` and `After`, since it makes it part of the same service that it wants to wait on.

However, you can follow [this answer](https://unix.stackexchange.com/a/193854/148494) with `cvol.service` replaced with your `[email protected]`.
Relevant command: `systemctl show -p Requires,Wants,Requisite,BindsTo,PartOf,Before,After [email protected]`

Descriptions for keywords can be found [here](http://www.freedesktop.org/software/systemd/man/systemd.unit.html)