Account lookup on Opportunity not filtered correctly from Visualforce page

Question

Visualforce

Our organization uses a Visualforce page to override the New Opportunity action. Below is a functional sample of the Visualforce page that specifies the Account lookup field and demonstrates the issue:

<apex:page standardController="Opportunity">
<apex:form>    
    <apex:pageBlock mode="edit" title="New Opportunity">            
        <apex:pageBlockButtons>
            <apex:commandButton action="{!save}" value="Save" />
        </apex:pageBlockButtons>

        <apex:pageBlockSection>            
            <apex:pageBlockSectionItem 
                HelpText="{!$ObjectType.Opportunity.fields.AccountId.inlineHelpText}">
                {!$ObjectType.Opportunity.fields.AccountId.label}
                <apex:inputField value="{!Opportunity.AccountId}" required="true"/>
            </apex:pageBlockSectionItem>
        </apex:pageBlockSection>
    </apex:pageBlock>
</apex:form>
</apex:page>

This is displayed as:

Compared to the standard lookup on the standard page layout:

Lookup Filter

This causes an issue with a lookup filter on the Account lookup. The lookup filter we are using has the following criteria:

1. Opportunity: Opportunity Record Type equals Equity
2. Account Name: Account Record Type equals Investor
3. Opportunity: Opportunity Record Type equals Debt
4. Account Name: Account Record Type equals Lender

With filter logic of (1 AND 2) OR (3 AND 4).

Note: It looks like only the Opportunity: Opportunity Record Type filters are causing the issue. See the below update.

The Issue

When looking up an Account from the standard page layout, the filter works correctly:

But from the Visualforce page, no results are returned in either Recently Viewed Accounts:

Or in Search Results (regardless of what is searched):

Note: without the lookup filter, the issue does not occur. Additionally, if the Account ID field is filled by other means (i.e. if it's auto populated by the New Opportunity button on the Account), the filter logic is correctly applied. This issue also occurs regardless of the current user's permissions.

Question

How can I make the Account lookup on my Visualforce page behave the same as it does in the standard page layout?

Update

Simple filter criteria (i.e. Opportunity: Closed equals False or Account Name: Account Name not equal to Fake) do not cause any issues. Additionally, filtering by only Account Name: Account Record Type works fine. Any filter on Opportunity: Opportunity Record Type causes the issue.

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_{We originally attributed the error to the lookup filter. Here's a link to the original question.}

Answer 1

The issue had to do with the Opportunity Record Type somehow not being properly set for the record.

By adding

<apex:outputField value="{!Opportunity.RecordTypeId}" />

to the Visualforce page, I could see that the Record Type was what I expected; however, the lookup filter thought the Record Type was not set at this point.

I was able to get around the issue by making the New Opportunity action skip the record type selection page and setting the Record Type in an inputField on the visualforce page:

<apex:inputField value="{!Opportunity.RecordTypeId}" required="true" />

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Thanks to rao for helping figure out that the Opportunity Record Type was causing the issue.