Sylvan wildbloodline and Eldritch Heritage: Animal companion at -5 levels?

[Cheapy]

Your effective sorc level is treated as -2 for powers in Eldritch Heritage.

Your effective sorc level for the animal companion from the Sylvan bloodline is -3.

Do these stack? Will your animal companion be 5 levels below you the whole time unless you take boon companion? Even then it'd be one level behind you!

[Austin Morgan]

Yes, they do.
Yes, it would.

:)

[Cheapy]

Damm, that's rough. That's kind of what I thought, but I wanted other opinions.