Hibernate paging get error result if row have same value

Query queryHot = session.createQuery(
   "from HotPost ORDER BY popularity DESC");

queryHot.setFirstResult((page - 1) * pageSize);
queryHot.setMaxResults(pageSize);

solve:
Query queryHot = session.createQuery(
   "from HotPost ORDER BY popularity DESC,id");
==================================
Before:
id   popularity 
1     9   |
2     8   |  page 1
3     8   |

5     8   |
6     7   |  page 2
7     5   |

AFTER:
id   popularity 
1     9  |
2     8  |  page 1
3     8  |

4     8  |
5     7  |  page 2
6     5  |