Yes, Pro-Line recommends that all tires with closed cell and regular foam inserts (including Pre-Mounts) have 2 holes in the tread to prevent air from being trapped in the tire.
Make sure you use a Cyanoacrylate (CA) type glue.
The color dot is something that Pro-Line has added to the sidewall of all our tires. This identifies the compound of the tire.
Check out the Tire Selector Tool!
If you think you have received a defective item please let us know and we will be happy to review possible options for replacement or return.
In order to process your request, we will need proof of purchase, photos of the item(s) in question, and your complete mailing information.
We would be happy to get you a quote for the stock replacement foam that came with your Pro-Line tires!