Vista - Enexpected output when using output-csv

when I add the Output-csv my my code, I get different output than what I got
on the screen. Here's my code:

@(
ForEach($user in Get-Content "C:\inlist.txt") {
Get-QADUser $user | format-table LogonName
}) | export-csv c:\outlist.txt

The output to outlist.txt is:

#TYPE Microsoft.PowerShell.Commands.Internal.Format.FormatStartData
ClassId2e4f51ef21dd47e99d3c952918aff9cd,pageHeaderEntry,pageFooterEntry,autosizeInfo,shapeInfo,groupingEntry
033ecb2bc07a4d43b5ef94ed5a35d280,,,,Microsoft.PowerShell.Commands.Internal.Format.TableHeaderInfo,
9e210fe47d09416682b841769c78b8a3,,,,,
27c87ef9bbda4f709f6b4002fa4af63c,,,,,
4ec4f0187cb04f4cb6973460dfe252df,,,,,
cf522b78d86c486691226b40aa69e95c,,,,,
033ecb2bc07a4d43b5ef94ed5a35d280,,,,Microsoft.PowerShell.Commands.Internal.Format.TableHeaderInfo,
9e210fe47d09416682b841769c78b8a3,,,,,
27c87ef9bbda4f709f6b4002fa4af63c,,,,,
4ec4f0187cb04f4cb6973460dfe252df,,,,,
cf522b78d86c486691226b40aa69e95c,,,,,
033ecb2bc07a4d43b5ef94ed5a35d280,,,,Microsoft.PowerShell.Commands.Internal.Format.TableHeaderInfo,
9e210fe47d09416682b841769c78b8a3,,,,,
27c87ef9bbda4f709f6b4002fa4af63c,,,,,
4ec4f0187cb04f4cb6973460dfe252df,,,,,
cf522b78d86c486691226b40aa69e95c,,,,,
033ecb2bc07a4d43b5ef94ed5a35d280,,,,Microsoft.PowerShell.Commands.Internal.Format.TableHeaderInfo,
9e210fe47d09416682b841769c78b8a3,,,,,
27c87ef9bbda4f709f6b4002fa4af63c,,,,,
4ec4f0187cb04f4cb6973460dfe252df,,,,,
cf522b78d86c486691226b40aa69e95c,,,,,

If I kill the "| export-csv c:\outlist.txt", then I get this to the screen:

LogonName
---------
User1



LogonName
---------
user2



LogonName
---------
user3



LogonName
---------
user4

Why can't I get that output to the file?