I have created the following dynamic picklist.

for(firepond__Configurable__c prod : [select id, name, firepond__Item_Id__r.name, firepond__Item_Id__c, firepond__Item_Id__r.Salesforce_Product__r.name, firepond__Item_Id__r.Salesforce_Product__r.id, firepond__Item_Id__r.firepond__Description__c, 
                                                                firepond__RecordType__c from firepond__Configurable__c where firepond__RecordType__c = 'Product'
                                                                and firepond__Item_Id__c<>'' and (Not firepond__Item_Id__r.name like '%Veryx%')]) {
                    
                    productNamesMap.put(prod.Id, prod.firepond__Item_Id__r.firepond__Description__c);
                    productIdsMap.put(prod.firepond__Item_Id__r.firepond__Description__c, prod.Id);
                    FPXProd.add(prod.firepond__Item_Id__r.Salesforce_Product__r.name);
                        }             
                    if(productNamesMap != null){
                    productNamesList = productNamesMap.values();
                    }

        for(Product2 prod : [ select id, name from product2 where not(name =:FPXprod)]){
                    productNamesList.add(prod.name);
                    produc

The end user can filter this picklist by typing keywords in the text field. If the end user selects a value without filtering the picklist, the system will not return the currect selected value. But if the user filters the picklist to a few values, they will recieve the selected value. Why does the size of the picklist affects whether the system will return the value the user selects?

Thanks,
ckellie