Does this come with the door anchor and exercise chart?

Yes. And SPRI also has an app that has video exercises for the resistance bands

Why are the two cloth bands I got one supposedly for the door and the other for the ankle the same exact size. And why does only one have a ring?

The spri resistance band kit has 5 color coded cords light to heavy. 2 cord handles. 1 ankle strap the one with the ring, one door attachment( the one without the ring and a bag. If you need an instructions I would be happy to send one

What is/are the advantage(s) of purchasing the bands separately (because, separately purchased, these tubes are about $65 more)?

The xertubes are meant to be sold separately. The resistance set goes up to 150lbs. With the xertubes if you want more weight/resistance you can purchase more bands and customize the resistance.

ASIN	B079QHQJQ5
Additional Features	Non-Slip
Brand	Spri
Brand Name	Spri
Color	Green, Yellow, Red, Blue, Purple
Colour	Green, Yellow, Red, Blue, Purple
Customer Reviews	4.4 out of 5 stars 561 Reviews
Global Trade Identification Number	00759026716821
Included Components	Band Kit
Included components	Band Kit
Item Dimensions L x W	121.9L x 12.7W centimeters
Item Type Name	Band Kit
Manufacturer	Spri
Material	Nylon
Material Type	Nylon
Model Name	Resistance
Number of Resistance Levels	5
Recommended Uses For Product	Workout
Recommended uses for product	Workout
Sport	Exercise and Fitness
Sport Type	Exercise and Fitness
Style Name	Resistance Tubes,Resistance Band
Tension Supported	Heavy
UPC	759026716821
Unit Count	5 Count

SPRI Resistance Band Kit

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