MCOL separate claims

Rent Arrears

Sorry to ask again but I didn't really get a full answer to my question so I thought I'd try and rephrase it.

Is it possible to use the MCOL online service to make separate claims?

Specifically, can I make one claim against two of the tenants in a joint and severally liable tenancy and then, later, make a separate claim against another two of the tenants for the same outstanding rent and the same tenancy? (separate MCOL online claims with separate court fees)

It has been suggested that I should not do this but I can't find anything that says why I should not do this or whether it is permitted or not, so if you think I cannot or should not do this, could you, if possible, provide the reasons or where this is stated.
I understand that I can make claims against multiple defendants using the offline/postal service but I would prefer to use the online service.