Is there something wrong with the gear on your plane?

Nothing wrong, functioning as designed.  Prevent damage to fuselage in event of gear-up landing, but provides the learning opportunity as a primary/advanced trainer.

'Gimp

I've heard that the retract gear on this airplane was not necessary for efficient flight just a training aid for pilots. The picture may bear this out. Looks like it retracts just enough for a prop strike.

True - it is primarily for training value and brings only a small reduction in drag. 

The prop is wood core covered in fiberglass and designed to shatter to prevent engine damage.

The Russian design is extremely clever, lots of other neat little details - for example, the landing gear overcenters are designed such that if one collapses it overloads the other two so they cannot collapse. 

Also, the outboard aileron hinge bracket is mounted just low enough to keep wing structure from touching the ground if either main gear collapse.

The Yak is an amazing machine, love flying it.

'Gimp

The whole situation at POA/SZ for some reason reminded me of this and made me chuckle:

https://www.youtube.com/watch?v=Y0cF2piwjYQ

'Gimp