Pig glitch

My pig (Bob) was following me when I had a carrot on a stick. I jumped up a block and the pig ran in circles. I got on the pig and it wouldn't go up the block. Glitch? Also when I put my stick away sometimes it runs in circles, stops, walks somewhere, than runs in a circle again, no matter where he is.
(Sorry, no pictures yet because in 50b I can't take pictures, another glitch)