Are you suggesting that innocent man, who has been identified and spoken to by Scotland Yard, is 'in the frame' as a possible abductor ?
No, in fact I think that, as far as a working hypothesis goes, we have to accept that SY have good reason for having ruled bundleman out as an abductor - frustrating as it is for us that we haven't been given the reason.
I am trying to make sense of the fact that the respective descriptions of Smithman and former bundleman are uncannily similar.
If bundleman is innocent, and Smithman is also innocent, that means that there were two innocent men walking around PdL whose descriptions were very similar and whose children were very similar. In addition to all those similarities, there is a similarity in the relationship between these men and police: one of them appears to have been exceptionally tardy in coming forward to police, and another has not come forward at all. SO many similarities. Perhaps Smithman and innocentman are in fact the same person, and for some reason innocentman wants to leave the Rua Escola part of his wanderings that night out of his account. Just because his story, as he gave it to SY, is considered substantial enough for him to be ruled out as Madeleine's abductor, doesn't mean that every part of it is true.