为何这两种查询的结果不一样？

对一张表进行统计，一种是直接select出来，一种是先把select的结果insert into到临时表中，再从临时表中select出来，为何这两种得出的结果不一样？

第一种：

select top 3  '杂志分析','1','杂志下载最多',ObjectID,count(ObjectID) mcount,

(select ml.[Name] from  MagazineDetail md inner join MagazineList ml on md.MagazineCode=ml.Code where md.Code=#userb1.ObjectID) as mname

 from #userb1

where EventName='DownloadMagazine'  

group by ObjectID

order by mcount desc

第二种：

create table #result(

	[td0] [int] IDENTITY (1, 1) NOT NULL ,

	[td1] [nvarchar] (150) NULL,

	[td2] [nvarchar] (150) NULL,

	[td3] [nvarchar] (150) NULL ,

	[td4] [nvarchar] (150) NULL ,

	[td5] [nvarchar] (150) NULL ,

	[td6] [nvarchar] (150) NULL

)



insert into #result (td1,td2,td3,td4,td5,td6) 

select top 3  '杂志分析','1','杂志下载最多',ObjectID,count(ObjectID) mcount,

(select ml.[Name] from  MagazineDetail md inner join MagazineList ml on md.MagazineCode=ml.Code where md.Code=#userb1.ObjectID) as mname

 from #userb1

where EventName='DownloadMagazine'  

group by ObjectID

order by mcount desc



select * from #result order by td0

drop table #result