Entity Framework left join su più tabelle crea invece inner join

Sto cercando di creare una query che unisce quattro tabelle insieme, solo una delle quali è garantita per esistere. Ho avuto successo a creare join a sinistra in EF prima, ma mai con più di un join. Ecco la query:

   var details = (from planInfo in context.PlanInfo
                 join templateRec in context.ProductTemplates
                    on planInfo.TemplateId equals templateRec.TemplateId into templateGroup
                 from template in templateGroup.DefaultIfEmpty()
                 join profileRec in context.CustomerProfiles
                    on planInfo.ProfileId equals profileRec.ProfileId into profileGroup
                 from profile in profileGroup.DefaultIfEmpty()
                 join territoryRec in context.Territories
                    on planInfo.TerritoryId equals territoryRec.TerritoryId into territoryGroup
                 from territory in territoryGroup.DefaultIfEmpty()
                 where planInfo.ActiveStatus
                 && planInfo.PlanId == plan.PlanId
                 select new
                 {
                    PlanId = planInfo.PlanId,
                    TemplateId = planInfo.TemplateId,
                    TemplateGridId = planInfo.TemplateId,
                    ProfileRec = (profile == null ?
                    new
                    {
                       ProfileId = 0,
                       ProfileGridId = 0,
                       Description = string.Empty
                    } :
                    new
                    {
                       ProfileId = profile.ProfileId,
                       ProfileGridId = profile.ProfileId,
                       Description = profile.Description
                    }),
                    ProfileId = (profile == null ? 0 : profile.ProfileId),
                    TerritoryRec = (territory == null ?
                    new
                    {
                       TerritoryId = 0,
                       TerritoryGridId = 0,
                       Description = string.Empty
                    } :
                    new
                    {
                       TerritoryId = territory.TerritoryId,
                       TerritoryGridId = territory.TerritoryId,
                       Description = territory.Description
                    }),
                    TerritoryId = (territory == null ? 0 : territory.TerritoryId),
                    Description = (template == null ? string.Empty: template.Description),
                    TemplateEffectiveDate = planInfo.TemplateEffectiveDate,
                    TemplateExpiryDate = planInfo.TemplateExpiryDate,
                    MinVolume = planInfo.MinVolume,
                    MaxVolume = planInfo.MaxVolume,
                    AccrualPercent = planInfo.AccrualPercent,
                    AccrualPercentNatl = planInfo.AccrualPercentNatl,
                    EffectiveDate = planInfo.EffectiveDate,
                    ExpiryDate = planInfo.ExpiryDate
                 }).ToList();

Ed ecco l'SQL che genera. A prescindere da ciò che mi sembra di fare, ottengo sempre più INNER JOIN seguito da LEFT JOIN , quando quello che voglio è tutto LEFT JOIN .

SELECT 
    [Filter1].[PlanId] AS [PlanId], 
    [Filter1].[TemplateId1] AS [TemplateId], 
    [Filter1].[ProfileId1] AS [ProfileId], 
    [Filter1].[Description1] AS [Description], 
    CASE WHEN ([Extent4].[TerritoryId] IS NULL) THEN CAST(NULL AS int) ELSE 1 END AS [C1], 
    [Extent4].[TerritoryId] AS [TerritoryId], 
    [Extent4].[Description] AS [Description1], 
    CASE WHEN ([Extent4].[TerritoryId] IS NULL) THEN 0 ELSE [Extent4].[TerritoryId] END AS [C2], 
    [Filter1].[Description2] AS [Description2], 
    [Filter1].[TemplateEffectiveDate] AS [TemplateEffectiveDate], 
    [Filter1].[TemplateExpiryDate] AS [TemplateExpiryDate], 
    [Filter1].[MinVolume] AS [MinVolume], 
    [Filter1].[MaxVolume] AS [MaxVolume], 
    [Filter1].[AccrualPercent] AS [AccrualPercent], 
    [Filter1].[AccrualPercentNatl] AS [AccrualPercentNatl], 
    [Filter1].[EffectiveDate] AS [EffectiveDate], 
    [Filter1].[ExpiryDate] AS [ExpiryDate]
    FROM   (SELECT [Extent1].[PlanId] AS [PlanId], [Extent1].[TemplateId] AS [TemplateId1], [Extent1].[TerritoryId] AS [TerritoryId], [Extent1].[TemplateEffectiveDate] AS [TemplateEffectiveDate], [Extent1].[TemplateExpiryDate] AS [TemplateExpiryDate], [Extent1].[MinVolume] AS [MinVolume], [Extent1].[MaxVolume] AS [MaxVolume], [Extent1].[AccrualPercent] AS [AccrualPercent], [Extent1].[AccrualPercentNatl] AS [AccrualPercentNatl], [Extent1].[EffectiveDate] AS [EffectiveDate], [Extent1].[ExpiryDate] AS [ExpiryDate], [Extent2].[Description] AS [Description2], [Extent3].[ProfileId] AS [ProfileId1], [Extent3].[Description] AS [Description1]
        FROM   [dbo].[PlanInfo] AS [Extent1]
        INNER JOIN [dbo].[ProductTemplates] AS [Extent2] ON [Extent1].[TemplateId] = [Extent2].[TemplateId]
        INNER JOIN [dbo].[CustomerProfiles] AS [Extent3] ON [Extent1].[ProfileId] = [Extent3].[ProfileId]
        WHERE [Extent1].[ActiveStatus] = 1 ) AS [Filter1]
    LEFT OUTER JOIN [dbo].[Territories] AS [Extent4] ON [Filter1].[TerritoryId] = [Extent4].[TerritoryId]
    WHERE [Filter1].[PlanId] = '12345'

Sperando che qualcuno possa far notare cosa sto facendo male qui. Grazie!