Hi betasec,

I think you have just to change the subscription mode from DISTINCT to MERGE in this statement:

var scrollSubscription = new Subscription("DISTGINCT",page2Group,stocksSchema);

Please note that DISTINCT and MERGE are subscription modes not compatible between them, so you can not subscribe the same item both in MERGE and DISTINCT mode. I confirm you that this was not changed from previous Lightstreamer version.
For this reason it is good practice to implement the method modeMayBeAllowed of MetadataProvider to define
precisely subscription mode allowed for each item according to the nature of the data.