Instagram android apps

Is there a bug? Unable to edit or comment I have been on instagram and deleted my account. Done this thrice. Reason? I don't know what's with the app. It doesn't appeal me much with the ongoing list of issues. Can't edit. Can't comment. It's like a piece of cake you can look at but not eat it!!! Highly disappointed. Please fix the bug to improve user satisfaction and experience. And yes I have even downloaded older versions and upgraded versions both and tried doing the same. 

Instagram android apps Description

 Instagram is a simple way to capture and share the world's moments. Transform your everyday photos and videos into works of art and share them with your family and friends.

See the world through somebody else's eyes by following not only the people you know, but inspirational Instagrammers, photographers, athletes, celebrities and fashion icons. Every time you open Instagram, you'll see new photos and videos from your closest friends, plus breathtaking moments shared by creative people across the globe.
Over 300 million people use Instagram to:
* Edit photos and videos with free, custom-designed filters.
* Improve photos with 10 advanced creative tools to change brightness, contrast and saturation as well as shadows, highlights and perspective.
* Find people to follow based on the accounts and photos they already love.
* Instantly share photos and videos on Facebook, Twitter, Tumblr and other social networks.
* Connect with Instagrammers all over the world and keep up with their photos and videos.
* Send private photo and video messages directly to friends.

i really enjoy this social app. i give you 4 star because of some limit. (1)only limited social site can be share through instagram viz, facebook, flick, tumblr,twitter, foursquare, plz add some more like google+,etc because they don't have cool image effect like instagram. (2) you can only tag 20 peoples at a time.