Stage 2 solids question?

when my daughter turned 6 months i started giving her stage 1 solids in the puree texture. I was then told by her nurse to give her stage 2 foods at 7 months in a mashed texture. I have done this but when i feed her she will swallow a few spoonfulls and then she will start just leaving it in her mouth for a few minutes and then swallow it. if i give her something more liquidy like yoghurt she gulps it down with no problem. Should i continue the mashed texture or should i go back to puree.